Man I don't care how pro-black you are. There are certain levels of decency, outside of special circumstances, that are expected. If he was dating a black woman doing the same shyt, the same would apply. At least based on what we see, this is just a random couple, minding their own business not bothering this dude and starting some shyt with him. If dude was just filming from a distance giving commentary, while its still petty as fukk, I don't think people would care as much. Going up and fukking with random people is some shyt that many people don't tolerate.
I've never dated a white woman, not attracted to them, and I find some black men's weird worship of them kind of unnerving. However, you only can control what you do in your life and trust me, at the end of the day if these dudes are dating for c00ninig reasons and they have the ability to recognize being mistreated through racism, they'll get their wake up call without your help.
But, if I'm minding my business after I paid to eat at a restaurant and trying to relax and you come to start shyt with me, you're getting shyt in return. Don't care what the circumstances are.
P.S. I don't care how ugly the chick is either. I can be dating miss piggy. None of your damn business. fukk off out of my face.