The problem is the lying isn't an individual fault here, it's cultural, it's part of the religion, and it's been going on so long it's probably part of their DNA (hence the propensity towards schizophrenia).

Judaism is based on lying to god, playing tricks and gaming rules. Then culturally, they live in isolated enclaves inside other host nations. The people who are going to be the most successful in that situation are people who can keep multiple fabricated stories in their head at the same time. Liars. That's who wins in the society they've created. They've been breeding liars for 10,000+ years.