@italiangreyhound
I understand that you don't endorse violence, you've made that very very clear. I am not you and you are not me; therefore our outlooks & visceral responses to external stimuli will naturally differ.
However, I was offering a perspective in response to this question:
"Why is Jay suddenly letting out his rage?"
I understand his rage and his frustration, on an average day using your "smarts" is the adopted approach, in order to be a law abiding and civilised member of society.
But the build-up of the micro-aggressions takes it toll on your spirit.
Some aggressors cannot be reasoned with and refuse to resolve issues via dialogue, they just want to fight. Which is what we witnessed in this scene.
Fortunately in my day to day life I haven't experienced this level of vitriol and abuse. I used to say we are lucky in the UK because the racially charged abuse is more covert here than it is in the USA. But the racism has changed in this country since the Brexit vote. If someone was verbally abusive towards me, I'd probably tolerate some of the abuse and laugh it off as a tactic to frustrate and dismiss them. But if someone was physically abusive towards me I'm swinging back.