Caleb just had slapped your beloved father, Tommy. And challenged all of your bros with a sassy smile on his face, so there wasn't other option than to confront him, right? Honestly, I thought, that Caleb is bigger than that, and he started this fight out of a sense of loyalty to the fraternity to which he belongs. And eventually he will come to truce with the MC, as Chad did. But it looks like that will never happen.
Vinny didn't beat MC, that's correct. He just came to MC's home and dumped a big diarrhea shit on MC's table. Nothing to look at there, Mr MC, just an ordinary courtesy call.