I gave a reason before, you've been wrong about who is guilty for every day phase. Right now you're not exactly coming up with brilliant defenses either.
Have you been right? And I had one theory with a back up theory that was proven wrong and have been trying to come up with a new one. I think thats a fairly adequate defense over "oh, lemme save my butt by changing my vote to Rebel, whom Im tied with so he gets lynched instead, nevermind if hes a town or not." cause really, thats all your vote says, which comes off really scummy