It’s projection.
They cannot conceive of someone not doing what they do. They think everyone does it. Probably because everyone they know DOES do it.
Or they are trying to justify themselves in their minds because they know they are wrong deep down inside and by convincing themselves that *everybody does it*, then they feel vindicated and not so much guilt.
I've come to the conclusion leftists are incapable of feeling guilt because they are able to justify all their crimes by one thing; BAMN. By Any Means Necessary. To them no deed is bad as long as it furthers their objective mission to destroy America from within. Of course they don't see it this way but that's exactly what they are doing.
Notice the similarity to the Muslim taqiya which gives muzzies the approval to lie in order to further the caliphate? Leftists and Muslims have a lot in common but also a lot of major differences. I wonder if the leftists know many among them have a date with a tall building if they win...