The divides between the IS and TG communities are primarily sociopolitical...
It's convoluted and I probably couldn't do it justice discussing the roots and the modern position of the IS community at large.
Frankly, it's a lot more difficult these days (the last decade, really) what the IS community is and those that belong -- many variations, conditions, are being isolated some out of the sociopolitical side to bypass legal restrictions that may 'protect' intersex individuals and more specifically youth/babies along as well as the strong potential of a political undercurrent to the medical establishment's opinion on various issues, conditions, variations in the IS community.
But of my personal opinion... I wouldn't be offended per se.
I believe there's many parallels, an interconnection between the TG and IS communities, but the realities are we can be the best of allies where are issues meet and the worst of enemies where they divide... and that's largely due to the world outside.
Those that are TG and IS represent only a small portion of the IS community, the IS community is also overwhelmingly hetenormative and cis aligned -- truthfully, a large portion of the community would be offended by it -- but get annoyed at anyone that removes the comforts and privileges of passing or being on the downlow as much as they can.
They aren't too fond of me but then again, most people aren't. So that's nothing special.
Where I might have some issues...
There are TG IS people, of course, but the real concern here is that your identity of being intersex would primarily a social identification, now there's enough evidence that we can suggest a deeper connection through the potential of male/female brain differences and bodily chemistry, however it would still put you in another category to the rest of us.. unless this causes more significant changes than what we recognize as being TG.
The concern would be that someone that is TG and IS.. they likely will have more specific medical needs dependent upon their variation that may be undermined by your identity as such.
As a whole IS people are only a small fraction of the population, TG IS people are only a small fraction of the IS population and medical research as a whole is significantly behind where it should be....
though the same could be said of the TG community too, so if there's any researchers examining the health and other concerns of IS TG people... they would be losing out if more TG people are identifying as being IS too.
And of course, it would affect the IS community as a whole... as well as the TG community as a whole.
And of course, there are the convoluted sociopolitical issues too.... let's face it, a fair portion of the TG communities doesn't necessarily want to be associated with the IS communities anymore than the large portion of the IS communities doesn't want to be associated with the TG communities.
They both have their stigmas in the world outside and the potential for greater abuses, bigotry... for a while, even the queer communities didn't want to deal with the IS communities (again, likewise) because the minor support that validates reparative or conversion therapy.
And actually for many queer and trans IS people that has been used an excuse - that you're not actually trans/queer, it's a symptom of your condition -- to which even lgbt friendly groups might look the other way or throw your under the bus, because what if it is?
Of course, they did the same thing with trans groups, mental health, other minorities and heck they're still passing the buck with the inactive 'it gets better' campaign when it comes to lgbtiq* youth.
Where we are now both in research, legal and social politics... it would be better if you keep it to TG and maybe use IG as a connection line to the social/psychological aspects and experiences.
But if you need numbers for your protests or want to join ours... communicating our connection through our social experiences, the places where our politics intersect particularly where we become more aligned in the us vs them, we're closer to one another than we are to those on the outside when it comes to so many things, in so many aspects of society and our mutual experiences, particularly in the way of health, treatment and research, and in the way of our conditions/variations are treated by those on the outside...
showing your connection on these other levels is brings down the level of offense which for most IS is more a defense and insecurity for a multitude of issues, from the outside BS to the internalized phobias.
Though if you want to present the line charts are good - there's more than enough out there pointing out the differences between everything - think and explore how the IS and TG communities are connected, don't spell out the connection just present them side by side.
That's how you might avoid the hijacking claim, it's difficult with the rabid rad breed of any group, as I'm sure you already know...
simplified, socially, our experiences as a whole are close enough that in many ways TG and IS are interchangeable ... 'course our inner politics and definition, separations, variations of being in both groups, do make things difficult.. never so simple.
But eh, it's easy to be 'offended' at anything -- still, if we remove the tags from our groups, reading/listening to the experiences of one another, again, mostly the way we make our way through the world... it's difficult to separate the two - to clearly point out the which is which, who is who.
though I'm talking in circles... there are divides too. The largest complaint one would hear out of the IS community, and unfortunately mostly from crazed, vocal, bigots... also, unfortunately with a bit of truth is the fear that some TG people claim being IS to circumvent the prejudice by believing that being IS will justify being TG -- however, the realities are we're not very well understood, and often only used as a greater excuse to stigmatize both communities... and sometimes with legal incentive - IS variations are still seen as abnormalities rather than variations by most of the medical establishment - freaks of nature in need of correcting - the movement against surgeries on infants has progressed (light years beyond what we would have believed a few years ago) but it still has years to go to really gain a fuller understanding or support -- however for the rest of us, inclusive of TG, it's questionable how much further and fast that support and understanding will extend to the rest of us... we're a bit more invisible and our communities are still in their infancy -- most people only understand us as concepts and theories, and we're each piggybacking on other communities to move forward...
after typing all... with a sigh of exhaustion, I'll say no I don't really care... but we both know it's more complicated than that when it comes to everything else. We're just not there yet to say it doesn't matter... if it's not the public at large, it's all the bloody forms everywhere else.