I tend to select friends over personalty and character traits, not political ideas. However, given that your question presumably assumes "character traits being equal" or it wouldn't be possible to frame it…

…if they promoted depriving babies of bodily integrity, torturing them, and living off of that, then yes, they'd stop being my friends faster than if they had told me that I should turn myself over to police for being a pedo.

There is a hierarchy of ideals. Everyone has it, of course, not just me. In my hierarchy, though, circumcizion ranks higher than even pro-/anti-pedophilia. Sorry to be so stupid.