Intolerance is the wrong framing. You should be understanding. People who throw the label "bigot" around are themselves bigots (convinced of the superiority of their own beliefs without engaging with others views). A lot of people can have genuine disagreements with certain ideologies (e.g., they might think that transitioning minors is net negative for society) but also be open to dialogue. Such people are not bigots. Those who disagree with the left on any given point may or may not be wrong, but disagreement is not bigotry. There is no paradox there.

There is also a difference between speach and action. As a society, we should allow all speach (e.g., people questioning authority), but supress certain actions (e.g., violence). Currently, the American left seems to believe that people voicing the wrong views justified violence. That belief is abhorrent and fundamentally completely at odds with liberalism and a just and well functioning society.

Specifically, re-tolerance of intolerance, I highly recommend a speach by Rowan Atkinson on exactly that topic. If you Google it you can probably find it. It is worth a watch. He is an incredibly intelligent and eloquent man.