Do you think that human genetics which gave us higher levels of abstract thought and language, also can sometimes make us vulnerable to indoctrination by irrational beliefs ?
Not directly, as we change over time it's not a guided path, a but more random especially with how easy it is for the worst of us to survive, language a d abstract thought would come more from nature than nature. We have great capacity for it but it has to be honed to be useful.
Since you mention "genetics", about 10 years ago, an interesting study was carried out on morality in babies and toddlers by Yale University. The study concluded with a strong suggestion that humans are born with hard-wired morality. I take that babies are born atheists but are vulnerable to someone's or something's influence.