That's an easy one. America has had a couple of centuries of systemic racism keeping majority-black communities poor, uneducated, and not particularly fearful of prison (relative to majority-white communities). When you combine that poverty with an easy opportunity to loot something valuable in a situation where there's a perception of not being caught due to the chaos, people will loot things. There will have been poor white people in the videos you watched, but your biases mean you focused on the black people instead.

That's not a suggestion that you're racist. It's simply that you've grown up in a society where white people are literally considered superior. The white supremacy is all around you. You don't notice it in the same way you don't notice the air you breathe. When someone points it out though, you should probably listen at least, even if you choose not to act.

Also, it's not Trump's fault. It goes back far further than Trump. He's simply a clever grifter who found a way to capitalize on it. His family is the better part of $3bn richer since his presidency...