I don't know if there is a "war" on transwomen of color but discrimination against the perceived norm is very much alive. Also, women are still an acceptable object of violence for a lot of men so any woman, black, white, trans or GG is a target. Brandon Teena became a target of rape and humiliation when his murderers confirmed by force he was female-bodied.
Prostitute women are in particular an easy target for killers. Like a soldier, whoever chooses such life chooses its risks too. Coming from the third world, I don't know that I can understand Americans being forced into a life of prostitution so I surmise that whoever practices prostitution understands the risks associated or has made a lot of bad choices. In the case of Tayshia (or any trans victim), the only thing we should care is that she's a sister that was killed, nothing else.
As a side note, in a society as multicultural as the US, racial discrimination is rampant. A lot of people are still tribal and work for their little cliques, so eventually the whites distrust the blacks, the blacks distrust the latins, the latins distrust the asians, etc. I wish we'd stop passing this ball of hate and not become the best oppressors our oppresors taught us to be.