Hey, Oubliette. I went to bed last night before I saw your question.
When I say "Keep your superstitions to yourselves." I mean religious people who are incontinent with their religious views, particularly those who use their views as an excuse to effect changes in laws that require others to give them deference or change themselves and their public life in order to appease said religious folks.
Sorry, not a perfect sentence, but I'm still working on my first cup of coffee. :)