The radical madrassas (Islamic schools) offer free room and board (paid for from subsidies from Arab oil) in exchange for submitting to indoctrination. Graduates become radical imams in the mosques (again with Arab subsidies). The net effect is they take over within a generation or two
I think Malaysia has pretty high economic indicators compared to most Islamic nations(almost near to Persian Gulf states)-it’s made amazing progress since the past 30 years & it cannot be attributed to Arab oil.