To say that a particular culture can influence people from that culture in such a way as to have an impact on how they may behave is not in itself an extreme thing to say.

For example, to say that most men in Britain have grown up in a sexist culture, and this means our attitudes and behaviour towards women are liable to be affected, and that this can be a factor underlying such things as domestic abuse and rape, is quite a reasonable thesis, and is not at all the same as saying that all British men are rapists or are likely to be rapists.