<...Liberals tend to not be afraid of learning about others beliefs.

I assume you are talking about religious beliefs, since they seem to be firmly set against learning anything new about politics.

And they are happy with other beliefs as long as those beliefs don't conflict with their own ideas. The Left likes any religion that has at least one of two characteristics:

A: Demands absolutely nothing of you in the way of personal responsibility or behavior. Crystals, and Gaia worship are good. A lot of vague Eastern beliefs where the deities look and act more like cartoon characters than anything else, or are primarily concerned with where you move your furniture, are good. A religion that involves any god personally interested in what YOU are doing with your life is not good. Too much like those repressive parents we worked so hard to escape, I guess.

B: Is anti-Western. Islam meets this criteria so well that it overrides the fact that it fails criteria "A."

Fuzzy paganism meets both criteria, and is very popular today.