Basic attitude and orientation common to some Muslim cultures. There is no such thing as "Muslim culture".

Many Muslim leaders do speak out, very vocally. But the Western media makes a determined effort to not report it when they do. This is a complaint that quite a few Muslim leaders have. They feel that the Western media completely ignores them when they speak out against horrendous things done by other Muslims, and then the very same media criticizes them for not speaking out. This is a part of the discrimination that Muslims are subjected to by Western countries.