But there has to be some dividing factor between people that are Perl programmers, and people that are programmers and happen to use Perl.

Why? Why does it bother you so much that other people don't like what you like as much as you do? Why is it important to mark out people who are "Perl programmers" and those who are "programmers who happen to use Perl"? I love beer, but I don't feel sad that some of my friends don't drink at all - it's their choice. Do your bit for advocacy of the things you love, but don't if the people you're advocating it to don't think the same way you do.