We're all aware that anti-trans groups of all sorts will label being trans and/or cross-dressing as being "blackface" or as some kind of cultural appropriation. I was wondering what other people's thoughts were on why blackface is unacceptable, but being trans and/or making oneself to appear female isn't. (This is going to be from an FTM perspective just because it's what I'm more familiar with, and because it attracts this "blackface" criticism far more than being MTF seems to.)
I think it's ok because, for one, gender is a biological component of the brain that can be influenced by hormone levels during fetal development while race isn't, so it's possible to be born with a gender that doesn't match your outside appearance, while it's not possible to be born with a mental race that does not match your outside appearance. It's also a well-documented phenomenon that millions of people claim to be a gender that doesn't match their assigned one, while pretty much no one is claiming to be a race that they weren't born as and taking steps to alter their appearance and behavior to match a different race. So, the idea that a white person would claim to be mentally black and then go around in blackface 100% of the time is just a thought experiment and not something that anyone actually does, and is not a biological imperative that anyone actually has.
The idea that it's appropriation for men or transwomen to do or wear traditionally female things is also extremely one-sided towards women. Almost no one cares if women wear pants, even though pants were strictly a men's item of clothing for much of Western history, but it's apparently improper for men or transwomen to wear dresses. We accept that most of what society has historically labelled (or enforced) as being "male" is now unisex, but we haven't gotten to the point where things that are traditionally "female" are unisex, too. Those are still just for cis-women. It's empowering and liberating for AFAB's to wear men's clothing, but it's blackface for AMABs to wear women's clothing. This is neither fair nor consistent. I expect any anti-trans feminist who uses the "blackface" argument to always wear a dress, have hair longer than shoulder-length, and never go in public without makeup. If I can't have feminine things, then they shouldn't get to have masculine things.