The Al Queda Muslims don't know such fine distinctions. Or they sorta know but don't really care and are sending them out for maximum impact.
If this keeps up they can put a real crimp in the postal service with their next targets being UPS FedEx etc..... Suffice it to say the people who handle mail might start rebelling. They are fearful.
Well, I don't think the fundie Muslims are too fond of womyn's rights, abortion, and the philandering made very public lately by some very high-profile Dems. Makes perfect sense to me.
However, I think it is more likely just a fluke that the media targets hit so far are more lefty than others, and I predict that other politicians, including some Pubbies, will get powdered envelopes. Guess we'll have to wait and see.