I have a hard time responding to this. And I suspect many will assume political definitions here.
To me, there isn’t a ‘Liberal’ or ‘Conservative’ Catholic. There are the disciplines of the church (changeable), the doctrines of the church (can evolve over time based on the teaching magisterium inherent in the Church), and the dogmas that make up the Church.
A Catholic has to give assent to the Church and it’s authority. To the extent that they aren’t in communion (and I fail in this, I think everyone does to some extent) with the Church’s rules, they are in the wrong, and quite possibly sinning. I.E. a Latin priest cannot marry. If he chooses to get married then there are consequences, even though it is just a discipline. He also has likely sinned against the oath he made when he became a priest. If I choose to be pro choice, then I’m advocating for the allowance of an inherently evil position, and may be sinning myself.
While I have the power to do these things (advocate for married priests, or abortion) I don’t have the authority. So if I exercise my authority to do those things, I’m in the wrong.
There isn’t a ‘conservative’ or a ‘liberal’ about it.
There is leeway in some matters. I can choose to go to Church in jeans for a variety of reasons, and while it may bug someone, it isn’t sinful or necessarily wrong. I can choose to disagree with the Pope’s stance on immigration or taxation; and that is just fine.
But in matters of faith and morals I’m bound to educate my conscience properly and give assent to the Church.
So someone not in line with the Church (be it someone attacking the Pope’s validity, or advocating for something out of line with the faith and morals of the Church) isn’t ‘Liberal’ they are just wrong.