Did you just use the word "amok", without checking whether it had racial connotations? That sounds like Hate Speech, which is one step worse than Hate Murder on the PC scale - approaching Hate Disrespect to Barack Obama.
Amok is a tropical disturbance of the mind.
We could say gone berserk, but that has Scandinavian connotations (it means “bear shirt” which is what the old Norse warriors donned before they raged fiercely into battle).