That's the game these guys play. It's rapid fire, low-substance Just Asking Questions again and again and again. There's never any actual thought behind it because there's no real desire to engage in the debate as a whole.

They don't have backing evidence and don't need it because they aren't starting from a position rooted in facts or logic, they start from a position rooted in feelings like "gender being a social construct makes me feel weird" and work backwards to whatever position they stake out.

The best move is always to aggressively call them out for what they are - gullible rubes at best and sociopathic liars at worst - and to not even bother engaging with the muck they sling.