But one of the reasons that the laws to protect trans were created was because of the number of trans people who were harassed or assaulted trying to use their preferred restroom.
http://williamsinstitute.law.ucla.edu/wp-content/uploads/Herman-Gendered-Restrooms-and-Minority-Stress-June-2013.pdf
Those laws were created to protect actual victims. The North Carolina etc laws were created as a backlash, and that's the problem. One side is fighting for a group of people who are being harassed and assaulted. The other is just being spiteful, or worse trying to create contrived hypothetical scenarios as a counterpoint to actual violence that really happens.
It's true that people who marry outside of race can be rejected, they won't likely also face the same levels of violence, harassment, and discrimination on a daily basis (anymore) that trans people do currently. Really I did miss speak when I said "unparalleled discrimination" because it contained the tacit assumption that that would be a trans person's only minority group. I imagine being black and trans would only compound both forms of discrimination exponentially.