You’ve made one crucial error, you’re assuming people open to our political thought are ideological liberals and that the majority of the population are the same

They are not, the average person is idiosyncratic without any firm commitment to ideology beyond unconscious conditioning, those people are not liberals and are open to persuasion and that doesn’t require tolerance of liberalism

Ideological liberals on the other hand are not persuadable, they are committed to the project of advancing capitalism and will kill me and you for a paycheck

There is no advantage to our position in pretending liberalism holds any truths which is what toleration would require

They do not tolerate our worldview and seek to undermine it at every level of society from the lowest internet forum to the halls of congress, we have to do the same to overcome that chilling effect