Liberalism is Rationalism in politics.
Life is a corrupting process from the time a child learns to play his mother off against his father in the politics of when to go to bed he who fears corruption fears life.
My advice is very simple: if you can win a small battle, it gives you confidence in the political process to take on bigger battles, and so it is very much a bottom-up grass-roots way of doing politics.
Whether one believes or not, religion is as real a force in the life of the world as economics or politics, and it demands fair-minded attention. Even if you think the entire religious enterprise is at best misguided and at worst counterproductive, it remains vital, inspiring great good and, sometimes, great evil.