Wikipedia is generally a good place to start

And it depends on what you mean by “liberalism” — freedom to do what?

Specifically on the topic of whether his ideas were freeing or repressive:

He believed in that sort of philosophy where everyone born into a group must be ideologically limited to the doctrines of that group, must not question those doctrines, must glorify those doctrines and through that glorification, work towards the advancement of the group. That dissenters from that doctrine should not be tolerated.

I am of the opinion that that undermines any claim towards liberality that one might attribute to him. But his time and place were so different from the present that if you understand his time, you can see how dissent was such a rare thing, and easy to condemn.

Again, context.

These labels like “liberalism” are really pointless unless you’re talking about one issue over a limited time-span. Freedoms often come at the expense of other freedoms. The thing Person A thinks of first when they hear the word “freedom” has everything to do with that individual’s priorities and circumstances in their surroundings.