Good questions.
I do know that many of the people I know who are Christians who have the same goals as I do disagree on how those goals should be met. For example, on the issue of gun control; as all of us do, they want safe communities etc... But think that we need better gun control in which to do that. I tend to disagree with them, but I want the same goal as them.
One can be a liberal and yet believe the whole sexual orientation issue that is happening in society is morally bankrupt and moving further and further away from the foundational principles to which our nations were founded on.