The thing is this, as far as I see it, you can not divide faith and politics because politics (or at least political things) has an impact on how we live in the world. If you are a person politics will have something to do with your life.
But our faith (Catholic) is not isolated to supporting views on only one side of the political spectrum. So the problem becomes when we try to reduce, limit and cripple Catholicism by shoving it into only one side.
We must let our faith inform out politics and not our politics rewrite our faith. And I think this is where we get problems.
And then there is the broader issue of just the terms conservative or liberal. The same thing, we can not shoehorn the Catholic faith into how those things are expressed. The thing is people want to use the words in whatever way reinforces their already decided view. And when they do that they can just assume that a person on that end is a cardboard cut our of what they want them to be.
This is also totally incompatible with the Catholic faith. Someone was so frustrated with me locally the other day because they could not grasp that I would be anti Abortion, anti death penalty, pro robust welfare, pro living wage, pro traditional views of marriage, pro refugee rights, pro protections for religious objections and against the torture of terrorists.
They wanted to know what political party that made me. I told them: None. They were mystified at what group could possibly hold those beliefs together and were sure there wasn't one. I told them what I identify as is Catholic. They said no, Catholics are Republican and conservative. I told them, well generally conservative but not how you mean it. Not lock step in the political sense.