God did not reject His people whom He knew previously. Or, do you not know what the Scriptures say in the passage where Elijah pleads with God against Israel?

But how did God answer him? [I Kings 19:18 says], "I [i.e., God] have kept for myself seven thousand men who have not bowed their knee [in worship] to Baal [Note: "Baal" was a term used for one of the idols worshiped in Elijah's day by Canaanites and others in Palestine].