I was on the side of Porky

Porky had no right to take their money.

Porky didn't have to humiliate those kids

Porky went too far.

Yes a group of underaged kids were in a strip bar trying to buy prostitutes. And Mickey did repeatedly go back there with the intention of fighting Porky.

But... Porky's bouncers could have done their job in the first place and not let the kids in. Then Porky didn't need to take $100 from them and lie to them about going into the dark room and waiting for the girls, only to have the floor fall out beneath them. Then he allowed his sheriff brother extort them some more. And finally he didn't need to beat Mickey to the point of serious injury. Yes Mickey was a hot head and was going to keep coming back. But he could have had the sheriff arrest him. And surely Mickey would have called his brother to come and get him, and his brother would have worked it out with the sheriff to ensure Mickey never came back.