My son goes to a comp school. His friend goes to grammar. My son went to friends birthday party and his friends friends were acting like entitled little pricks frequently talking about how much better they were because they were going to grammar school. My son defended himself as best as he could but I can't deny this is one of the main reasons I hate these types of schools.
Wibu to talk to friends mum about this and how my sons friend did nothing whilst this happened. I would hope in saying something her son remains grounded and the perceived hierarchy in education wouldnt erode their friendship.