So, you've just made it all right to harm transsexuals because they 'trick straight men into having sex with them', the issues that you seem to believe are mitigation against the murderer of a transsexual being guilty of first-degree murder are probably:
-Having sex with a male
-Not telling sex partner that you are the same birth sex as partner
-Sex outside of wedlock
-Possible prostitution (specifically, offering yourself sexually to men in exchange for money or other things of value)
I'm sure there are a few other things that can support your contention that the killing of a transsexual is not murder, but that the transsexual "got what he deserved."
What about female-to-male transsexuals? I don't see anybody freaking over them the way they freak over MtF transsexuals. For every two MtFs there are at least one FtM. It's hard to count them because they blend in so well.
Well, with the new administration, maybe a comprehensive hate-crimes bill will be passed -- one that disallows the 'trans panic' defenses that let so many murderers of trans-women off the hook with a legal slap-on-the-wrists or less.