A large part of liberalism is based on denial and slander, as their way of avoiding arguments. They won’t admit to history in its true form, for example. Hitler wasn’t a socialist, and Stalin wasn’t a communist. But you’re a racist, because Democrats freed the slaves.
I find that Liberals cannot think deeply, in terms of root causes. I had an argument with one today, in regards to taxing the poor. He couldn’t see the necessity of taxing those on low incomes, because they have so little. I explained to him that, when somebody doesn’t have to pay a price for their entitlements, there is no reason to not vote for more entitlements. Taxing the poor, even if its a relatively small amount, is a necessity to help protect the economy, which ultimately helps protect the poor. But he just could not see past that taxing low incomes, because they,have so little, was unjust.