Those studies dont work against their interests, they simply seek to address a problem that potentially works against their interests. If Jews suffer from higher than normal levels of mental illness, that is something that could affect their overall success and they would have motive for studying it and addressing it.

Psychopathy/sociopathy is much more stigmatized though, for legitimate reason. If they are aware of it being an issue among their coethnics, its likely they have adopted a let sleeping dogs lie approach to it.