Are you assuming that most straight white males are religious and Christian? There’s probably some truth to this, at least in the US, but I doubt that most straight white males are religious enough to have a persecution complex. Moreover, from my understanding and experience, the persecution complex is mainly attributable to Catholics, which further reduces the sample size. On the other hand, I think some flavour of a persecution complex could be attributed to any religion, not just Christianity. After all, religions control through shaming inappropriate behaviours and rewarding desired behaviours.