They talk about identity politics all the time. It is us vs them on everything. Worker vs employer is the quintessential example. Two groups that in the real world must work together, and do. But in the mind of the political left they are not just people that occasionally have adverse interests but mostly shared interests (my success is yours). No, they are sworn enemies.

I don't think you know what "identity politics" are, which is kinda funny to me. I would love to have discussions where identity politics meant "Worker vs Employer".

Worker vs Employer aren't actually 2 groups of people, unless you really consider corporations as people.