Can anyone tell me where they get into this concept that fathers are abandoning their children? As long as I know that mothers are the most alienating parents.

They say things like "Fathers didn't want the children custody" or "Fathers don't want to see the kids after the divorce" , "Fathers don't pay child support".

Where are these conspiracy theories coming from? Or it's just a hatred of fathers?

It's a new trend tho.