Some of the things he says are true. Yes, I know that if you ever find yourself agreeing with an incel then you should immediately stop and pause to examine your own world-view, but some things are obvious none the less. It’s the way he says them.
Let’s assume that my small, bookish schoolgirl mum, who comes from a large family and has 13 first cousins not counting the ’removed’s, doesn’t immediately notice that the galumphing great dickhead who’s just come and sat opposite her and is making clumsy attempts to converse, looks just like all the men she’s related to. Also, that I don’t immediately think “Hey, that’s a past version of my mum” (and @Anon-e-moose will know this bloke’s more Marjan Siklic than Marty McFly). What then? I reckon she’d just give polite, non-committal one-word answers until I got the message and moved away to do something else. Why wouldn’t she? She wouldn’t hate me, or be disgusted by me. But she doesn’t have to socially engage with me, any more than I have to socially engage with a drunk I’m removing from my place of work.
As for “If women didn't have a biological disposition to care for their offspring humanity wouldn't have evolved very far,” well, duh. Every one of the higher species cares for its kids. Even many of the lower ones. Last paragraph is just standard incel stuff.