I don't understand the point in killing them,even if you were tricked.Unlikely a tranny would be able to physically overpower a man, especially if they are dosed up on female hormones. The majority wouldn't want to,,most prefer being 'passive' and treated like women.
You are looking at spending rest of your life probably in a prison locked up with other men,especially with the whole trans/gay agenda thing,then you might actually experience getting on the wrong end of someone else's cock , the courts won't show no mercy,just as you didn't by killing the tranny.
Far better to simply expose them for what they are on social media/the streets if you seriously didn't know they were a tranny , the law can't touch you if you do that providing what you say is true and you make no threats . 'x is no woman he is a fukking fakkit' .Turn the embarrassment round on them.
If there was no trickery involved and the tranny was killed simply for being one, I have no understanding in the slightest, as it might be not normal but they aren't hurting anyone.