Maybe so but if you prove yourself you know you will be welcome, wether it is Anarchs or Camarilla. Heck you can even give them all the middle finger (best ending) but you must be batshit insane to join the Kuejin.
Anarchs, I can see. Cammies? Hell no. After the bollocking that every Cammie gave you from the very first second of your unlife, you'd be mad to willingly join them. In fact, the nicest people in the whole game are the Anarchs and the Nosferatu, which is pretty damned ironic.
As for the Kuei-jin, if you don't know the back history and only go by what happened in the game, they didn't actually actively attack you, did they? The Cammies most definitely did, and those are supposed to be the "your species"? Hah! :D