Who loses when Christianity becomes political?

In my conversations with people throughout the years about Christianity and Politics it seems like there is one thing that is consistent. Conservatives usually want to see Christianity plastered as a subtext to the campaign they support. Liberals get up in arms and defensive when they see Christianity plastered as a subtext to any campaign usually crying separation of Church and state. Who looses in these collisions between politics and Christianity. I think Jesus does. Before you liberals rejoice and you conservatives tune me out please hear my reasons. I am all for a Christian being able to take a political position or hold office. I am even for them having the freedom to base their position on the Bible. What I am not for is a whole church or denomination supporting a party. When this happens it becomes divisive. Christians who hold a liberal stance are offended. Christians who hold a conservative stance don't really gain anything in the end. The big problem here is really a foundational issue that arises out of the Bible. In Matthew 16:24 Jesus said to the disciples, “If anyone would come after me, let him deny himself and take up his cross and follow me.” The foundational problem with Christianity and Politics is that Christians are not getting involved under a Christian umbrella in order to follow Christ. The main reason that they trumpet to get involved is to protect our rights. But the last time I checked if we have died to self (Romans 12:1), rights should be a distant second or ever much further behind the glory of Christ. I would like to feel I can support other Christians but when I see my saviors name used to advance a political cause that has very little to do with His kingdom I find it impossible to support. My goal in living a God focused life is to advance His kingdom. Jesus kingdom is filled with grace something I see very little of in politics branded as Christian.