We spent an hour and a half on a discussion about it.
There's some line from Mao about how you can't expect to change people's political beliefs -- which they formed through a lifetime of experience -- in a short conversation or lecture. Persuading people (even limiting this to those who can be perduaded) to radically reshape the way they see the world takes time and patience.
There are tons of class traitors out there, and they've played a part in every successful leftist movement. One's material conditions inform how likely they are to become a leftist, but it's not strictly determinative. I think a lot of us fall into that determinative mindset here and there.