They wouldn’t do it otherwise.
If they didn’t have an agenda they wouldn’t be so blatantly hypocritical. They absolutely know they are hypocritical, and they don’t care.
We’re not going to agree on this. I at one time gave knee-jerk Leftists a lot more credit than I do now. Having sufficiently interacted with a great many of them, I am convinced they are simply not intellectually expansive enough to grasp more than their longtime assumptions and unexamined biases. I understand that your mileage varies.