They're not Jews they're "Progressives" which is a religion and a nationality.
They're citizens of the world and NOT Americans.
I think you're closer to the mark on this CO. I disagree with the authors' focus on the religion aspect of what truly is the moral bankruptcy of modern liberalism. They preach equality but the only way one can get there is through 'radical egalitarianism' - setting expectations in the gutter instead of the stars via the employment of equality through least common denominator.
They teach equivocation - of parsing and hair-splitting exercises wherein you keep slicing a thing finer and finer until you have nothing left.
They worship moral relativism where everything is anything - and ultimately is nothing at all.
And of course they wrap it all in plausible deniability championed by bill clinton ("it wasn't me; you can't prove a thing; I'll never do it again").
I learned as an nine year old a simple lesson about responsibility. My father gave me a small folding knife. Along with it he gave me the commandment to treat it with respect and be responsible for my actions. When I cut myself soon afterward, he reclaimed the knife and told me "You're not ready for responsibility". It wasn't the knife being careless - it was me being careless with the tool. It wasn't the tools fault - it was mine.
This is the preeminent leftist failing - a functional inability to accept responsibility. Have you ever known a leftists to admit fault? They cannot do it. I've even seen it in the corporate world where a manager would say "we" need to (do something) - thus alleviating himself of both responsibility and subsequent blame should things go sideways (naturally since it goes unchallenged he/she can always claim victory later when others make that something a success). Even those rare occasions (when cornered) when they do admit some culpability, they do so with caveats (he made me do it; I didn't know it was wrong; you did it too).
IMO religion only comes into the picture because leftists have no real use for it. Sure there are leftists in various leftist communities. That's because they don their religiosity like a suit of clothes. They do it for effect. Religious affiliation gives them cover.