All of it comes from the father of lies
In all seriousness, I agree that liars are some of the biggest blights on humanity(*). However, the real liars are not who you think they are, OP.
(*)As a very honest person myself (though I’m not above using exact words), I despise dishonest people immensely. Lying for no (good) reason only causes more harm than good. I know there’s the occasional “good lie”, and I don’t hate those, but IMO a lot of problems in this world can be traced back to a lie or dishonesty and falsehoods in general. Hell, even the bible says not to bear “false witnesses”, does it not? Yet a lot of religious folk conveniently ignore that…