Nevada

who appeared to perhaps be Michael's wife and she briefly tried to intervene but pretty much gave up because it's apparent that he has a problem and he's lashing out at everyone around him.

Again - we're sick and tired of ignorant and self-righteous people insulting POC and also tired of people telling the victims to just "walk away". Hector could have escalated with a stream of invectives matching what was coming out of Michael's mouth but he didn't. Sometimes people have to stand their ground. Otherwise we get people like Drumpf elected to office and the bully continues his behavior.

"Human" (animal) nature primordially established that type of alpha male behavior and in most cases, a new alpha emerges from the confrontation and they move on. Few men seem to hold "grudges" after the confrontation. This behavior is something that is outside of the scope of speculating on who should implement "conflict resolution" procedures - despite the fact that the airport security folks eventually did such.