Why is he responsible for the statements of some random donor? I don’t know why he would need to address those comments, it seems like some activists ambushed some random person on the street and she said something which wasn’t focus grouped and sounded bad. If she runs for office I guess she should address them.
but he chose “argues too much” and “scream at”, then said he should talk “like normal people”.
This is a common argument against progressives from moderates, of whatever race or gender or religion. You can not like that argument, but the fact that it’s used commonly against the populist left kinda detracts from the “oh, this is a dog whistle”