I do wonder how many people prefer Obj-C to Swift. Philosophically speaking, Chris Lattner's ideal of Swift could replace PL from Javascript to C, while a noble goal was a big no no for me. I often think Swift is an unnecessary distraction in the overall Apple ecosystem.
And I do notice programming language design and usage tends to get very heated in discussions. And there is a growing charm in ugly language ( so to speak ) that shuts up and get the job done.
But a disagreement is one thing, being shouted at during an online video meeting? That is some level of aggression. Although there is always two side of the story.