It's a game, we all play to have fun (I hope)
I have many friends in both clan and omni and if we are attacking omni bases, I rather attack a base of a guild I don't have many friends in, but we have no pact with anyone and I would never let omnis just take clan bases without helping, and I have no problem to attack any omni base either.
..and I don't know why, but PV seems to like to get stuck in my target and we always have a fun chat after