If a leftist "feels" you must be wrong, you are wrong. No amount of facts, no documents, no empirical evidence will ever convince them you are wrong and they are right, because they feel it must be so.
And there are no conservatives they exhibit this?
They are being conditioned, trained, and then indoctrinated with Marxist Activist ideology. The US is being educated for a Marxist takeover. They are the useful idiots. They being for the most part dependent upon the vast web of USG USD.