Nihilist sounds like annihilate. A nihilist wants to annihilate all religious beliefs.
Nihi= nahi+ list, so social rules are not in these people list
take the NIL part of it...NIHLISTS are people who consider everything NIL....or in other words, who has a tendency not nullify/destroy everything..
nihilist sounds like anhil which means to destroy !
if yu are in selection list you feel hil.It is traditional beliefs to be groundless and existence meaningless.