I think what he was saying is that when you say the _____ community that that "community" is entirely diverse in terms of their thoughts, economic position, etc. ie. you can't say that the 30-40 year old white male community all share the same ideas, thoughts, etc. Ultimately there will be diversity in many things among groups. I think that it is human nature for people to both gravitate to and away from people that share similar life experiences. Ultimately what I took out of it is that we are all individuals and that the second that we are divided we bitch, bicker and fight among ourselves while those that are ahead in life stay there and laugh at the rest of us.
He was outlining how identity politics is the nonstop division of factions for the purpose of creating incitement, discord, chaos, strife, for the purpose of radical change and a new order. Assuming there would be any order after it, because the stated goal is to "bring it all down", make the system untenable, make it collapse. This is the goal of the radical anarchists, always. Divide and conquer, we all fall.
No happy endings on that one and the vast overwhelming majorities of political overthrows result in worst tyranny than what preceded it. Anarchy is not a path to better, to Valhalla. Those not understanding that know nothing about the history of national and societal collapse and what that often ends up in.
Finally even if somehow, miraculously the overthrow of authority is successful and improves anything, that the movement is undeniably Marxist will of course wreak havoc with the markets, that are already heavily challenged. So that adding toppling of nations and toppling of Capitalism, and history, on top of the pandemic is likely to bring wide spread poverty, chaos, even starvation. In the name of lives mattering..