It's apparent from that response that you don't know this clown the way the rest of us do. It's not about not liking him so much as it is not wanting to deal with his/her/it's proven, colossal and consistent stupidity. I'm pretty sure that Sneaky was joking but expressing that someone who would associate with a person as destructive and toxic as Colbwa was/is is not someone you'd generally want to be associated with anyway.
And incidentally, no, you don't have to like or dislike someone based solely on what others think. That's commendable. But I'd like to think that seeing that screenshot, seeing someone verbally attack someone's RL family/child for no apparent reason would be enough to make someone think about the type of person we're talking about here... I, personally, wouldn't be rushing to the defense of "Holyhell"/Colbwa or anyone like his kind anytime in the near future. But maybe that's just me.