I haven't watched the video with sound, is it definitely Trump related?

Yes. Whether they were going to jump someone anyway and just happened to pick him because of a Trump sticker or whatever, who can say? But they're definitely taunting him for having voted Trump.

5 young strong black men, drag a old white guy out of his car, beat him up....

Common son, thats just something you dont do.
This should give atleast 5years in prison imo.

It's ironic how the left keeps preaching how "civilized" they are ...

You want to see ironic? How about white BLM supporters (including little white kids holding "I AM NOT A NIGGER" signs...) in the whitest part of the country beating up a black guy because he got too lippy with them?

like someone else said, if this were white people attacking a black guy,all hell would break lose in the mainstream and there would be calls for justice

And people wonder why people voted for Trump. The left would silence those who don't agree with them. They resort to name-calling, insults, shaming, threats, and violence. This is why Trump won.

it's a righteous anger, because now people of color and of different backgrounds now have to put up with this kind of shit. it's already in a snowball effect, and these kind of acts will only make it worst.

No, but you certainly should have a feel of guilt. If you would vote for someone who (extreme example) goes for genocide, then you should take the responsibility, because it was people like you who made it possible.

If 25 million people will get thrown out of health insurancy, then you take the blame as a voter, because you should've known what will happen. It is you to be blamed.

Giving up a vote and then go like "I don't care/not my fault" is out of question. You take the responsibility!

Pathetic.