You are just changing the situation to suit your narrative.
Colby wasn't assaulted at gun point or jumped by 5 guys. You can't just group a toy boomerang and a loaded firearm together as though they are the same thing or represent the same level of threat.
Colby started this whole fucking thing by acting like a complete asshole, being hateful, xenophobic/racist and antagonistic. He is a grown man and a professional CAGE FIGHTER who instigated a situation which resulted in a confrontation with a larger man.
Werdum didn't come up to Colby and slap Colby's girlfriend unprovoked, he didn't have a gun, none of Werdum's friends engaged in violence or threat of violence with Colby.
Those are the actual events that happened. If you want to engage in a bunch of hypotheticals, have fun, but doing so makes it irrelevant to the Colby Werdum situation.
He ran his mouth and got hit with a fucking boomerang in Australia
By a member of the group he insulted. If he would have acted like a grown up instead of a angry hateful child he wouldn't have been in the situation in the first place.
It doesn't make Werdum right but good luck campaigning for people to side with the racist instigator.