You should have prefaced this post with "Not to get political, but...". That way people know you're not bringing politics into the discussion and it absolves you of any misunderstandings which may occur when some people somehow construe your comments as being political in nature.
I know its frustrating that you have to take the extra step but you can't be too careful. Last week at work, I was telling this really funny story and I made sure to note "Not to be racist, but.." and this lady still got all bent out of shape and said my joke was racist. Unbelievable!! And I'm sitting there, like "Hello!!!!! Did you even listen to the beginning of the story?????????". Not to be sexist, but WOMEN...you know??? But I digress.