The act itself was just brutal, but the way everyone just carried on and pretended nothing happened has sort of become the norm in society today. Not that I would expect different behavior from a room full of actors at the Oscars. Easier to just be quiet, try to fit in and belong. Denzel Washington was coddling him during commercials. It's ridiculous.
Whatever this dude might be "going through" is no excuse to do what he did, in any setting, and to think that everyone knows what trials and tribulations you're enduring just because is the mark of a real narcissist. None of us are mind readers. This should have been the crowing moment of his professional life, but he completely tarnished it.
I was a freshman in high school, age 14, and I threw my first and only punch on the bus. I was being harassed by a classmate for several minutes. Tried ignoring him, asked him to leave me alone, he kept badgering me, so I clocked him in the face. Right as the bus came to my stop. Two things happened: 1) I was scared of what I had just done 2) Nobody ever f*cked with me for four years.
In addition, masks or no masks I think it is going to take a while for a lot of the general population to ease back into being in public places again with large numbers of people. The frustration, anger and isolation these last few years has done a toll on a lot of people mentally. Entitled actors and otherwise. I am already seeing it out and about these last few weeks at stores, sporting events, etc. Social skills and interaction are a tad "Off" and to some degree it is understandable.