First, it should be semi-final in the poll question.
Second, as someone who was at the Murray/Berdych match and the Murray/Federer match, I fail to see why OP and other posters think that Murray's not well supported in the UK. I was absolutely terrified by the Murray support when I was at the first match; it came pretty close to the level of craziness that I experienced when I watched Lleyton Hewitt in Melbourne. The support for him wasn't as loud in the semi-final, but that's to be expected. Federer fans come from every part of the world. I sat next to an American/Canadian girl who was cheering for Roger and I went with a guy from Hong Kong who was also a Roger fan, and I'm from Singapore. The fact is, Federer's popularity transcends nationality. The crowd support for him in the SF, in my opinion, had little to do with whether or not Murray is well-liked in the UK.
Just an anecdotal story: I bought a ticket to Roger's match with del Potro from this English guy on eBay. At the match I asked him who his favourite player was. He didn't have a strong preference for anyone, but said that he liked watching Roger play because he's just so good (
), but he wanted Murray to win the tournament because Murray is the local boy.
Bottom line is, you simply cannot gauge the level of home support for Murray when he plays Federer (or maybe even Nadal). I can't comment on the booing because I didn't know what was happening as I was too busy staring at Roger, but purely based on the crowd support for him at those two matches that I attended, I don't think he's widely hated or disliked in Britain at all. In fact, I'd say it's the opposite.