It really annoys me when people preach overtly political messages, even if they are taking a stance I'd be minded to agree with. The one and only time in my life that I walked out of church during the sermon was for that precise reason. It was in the runup to the 2012 election between Romney and Obama and the preacher took several cheap jabs at one of the candidates. Since they were a guest preacher I was looking forward to a different perspective on things but lasted less than five minutes before saying to my wife "this is cr*p" and walking out. The candidate the preacher was mocking wasn't the candidate I'd have supported (I was visiting the US, so I don't get a vote anyway) but if I want a political discussion I'll go to the bar - if I sit through a sermon I want a theological message.