It is the same whether you warn them or not, they cannot believe.*
وَسَواءٌ عَلَيهِم ءَأَنذَرتَهُم أَم لَم تُنذِرهُم لا يُؤمِنونَ
wa sawaaa’un ‘alaihim ‘a-anzartahum am lam tunzirhum laa yu’minoon
*36:10 Everyone is already stamped as a believer or a disbeliever. See Appendix 14.