This is often the problem with politics, you may strongly disagree with government policy on an issue that is important to you but all of the other parties that stand any chance at all of being elected to office also support the governments stance on that issue.
So your choice is either to concede that issue or vote for a fringe party (which here in the UK basically makes your vote worthless).
So your choice is either to concede that issue or vote for a fringe party (which here in the UK basically makes your vote worthless).