I get the impression that this is a 'some people' thread, with a subtext about other threads that (as usual) I am missing. In case it's not, however, I agree that politics is in everything we do, and I don't understand how anyone can say that they aren't interested.
I can understand people not wanting to say how they vote (on referenda or in elections) in certain contexts, as others will make judgements, and that may not be a good thing. I'm thinking of social situations where political beliefs don't matter (eg a knitting or Art group). Usually I think people should have the courage of their convictions though, and that if you (generic) have voted for something that is detrimental to others, you should be able to explain why you did so, particularly on a discussion board
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'It's just my opinion' doesn't move a discussion on at all, and as that should never be the basis of a decision to vote for something we should know why we chose to vote the way we did, whether it is about philosophical belief or based on compromise.
Not everyone wants to bang a drum all the time of course (thank goodness!), so I can understand people just wanting to chat about TV or knitting or whatever, but if you have made a political statement it is not acceptable to then pull back when challenged, claiming that someone else is politicising the discussion - that is one sided and rather unfair.