Mutants can be bigots, too.  Especially the hotheaded Pietro.  He’s consistently been portrayed this way, too.  See especially Peter David’s writing in early issues of X-Factor.  Great, great stuff–best Quicksilver comics ever.

Note: This issue was continued in Fantastic Four #150.  Unfortunately, I started blogging on F4 a month after I started on Avengers, and I haven’t been able to catch up yet.  So, we won’t be tying them together.  Anyway, this panel speaks for itself.  No need for continuity.