without getting too deeply into my views - as long as a long discussion doesn't break out - I think part of the problem is that when folks start speaking to the topic, they often confuse the issues.
for instance, there's a distinct difference in trying to define, for clarity's sake (for the ill-informed cis-friend) the difference in TS and the other TG sub-categories, and saying you do not want to be associated with the "others" in an activist sense.
There's a difference in saying - correctly in my view - that there's a distinction between a TS in transition having protections to dress as the target gender on the job and protections for a recreational cross-dresser do do so just because they enjoy it - and saying that you don't give a care about the concerns of the non-TS folks under the TG umbrella.
it's only rational to recognize divergent concerns. That does not mean a person who does is engaged in "throwing people under the bus"
I CAN state confidently that a transitioning TS NEEDS legal protections that go beyond what is practical regarding non-TS gender expression - and at the same time affirm that there IS a considerable spectrum of was in which a gender variant expression needs protection as well.
for one example - while I defend in the strongest terms my right to dress appropriately to my target gender in the workplace, I do not believe the law should recognize the same right for the recreational cross-dresser (i.e. a man who enjoys a female gender expression on occasion, but has no desire to alter their physical sex - or vice-versa) however at the same time, I strongly defend that persons right to not lose standing on the job because of what they do on their own time.
Different situations, different concerns, but both in need of legal protections specific to their situation. That's not an "My problem is more legit that your problem" attitude.
However, it's been my observation in at least some of these discussions that between folks making unwarranted assumptions about what other people are "really" saying, and people not being on the same page about what exactly they are talking about, you end up getting a lot more heat than light.