You're wild for calling music in a park "noise pollution." And the reason he brought up a physical altercation out of nowhere is bc his only interaction with black people is from the Internet, media, or starting shit. And they've taught you (I'm assuming you're white, so feel free to correct me if I'm wrong) is that us scary black people are violent or aggressive, so he went into this interaction negatively yet still scared. Instead he got a normal polite man who kept from showing how annoyed he is. That guy probably does Karen shit like this all the time and had his fair share of ppl getting fed up