As an Arsenal fan of many, many years, believe me I have got used to being the butt of others jokes.
And I'm more than happy at good natured banter. No harm in that. One of my mates is a City fan who lives near Manchester and been a season ticket holder for over 20 years. He's a good lad and his jokes about his and my team are funnier than anything I can come up with.
Personally, I don't have a problem with City. In the title race of recent years, I'd much prefer you lot to win it than your neighbours or Chelsea.
As for my fellow fans, like you I cannot be held accountable for the behaviour of all.
Only certain ex players have been reviled by Arsenal fans after moving on, largely because they displayed a lack of class in leaving.
I hope and expect you to finish above Utd.