V is no one I'd want anywhere in my camp. At the same time that he cheers the mental patient on to keep spitting and cursing, even joining in with the racial slurs, he's referring to him as a nervous poodle and allowing that the guy's a liar. Basically, just a shit stirrer who is enjoying the show while the mental patient loses control and ends up in restraints, and enjoys watching that restraint action happen too.
Support should be made of sterner stuff!
He's cautious with his support because he knows UNKewlJ is an unpredictable liar who might disavow anything at any point.
I'd go further and say that he's not just a compulsive liar, but a sociopath.
He's pretty much a pathological liar you can't believe anything he says. But also probably a sociopath and they have no guilt no shame no embarrassment. They simply make up lies to cover the other lies.