First of all, yes, the under cover cop was definitely on a power trip. However we don't know the reason for the under cover officer being there. We also don't know if the owner has had a history with the man arrested. Nor do we know if he has a criminal record.
Now here's the fun part buddy. I HATE when people start this finger pointing race card bullshit. A black man gets arrested and you're going to bring up Martin Luther King? Really? Aside from skin color I guarantee you they have NOTHING in common. And King was a puffed up social justice figure to begin with. I've seen white women in sun dresses be pushed to the ground harder than this guy was. No one compares them to Mother Theresa? See the problem?