there will be a resurrection and a judgment, where God will judge everybody as to whose side they were on. This judgment is based on believing in Jesus-salvation.
I'll make an old argument, but it's still a valid one. A person's religion is generally determined by their parents' religion. People are Christians largely because their parents are, same for Muslims.
If God exists (and is not evil) then would he really condemn millions of people based on an accident of birth, on what amounts essentially to pure luck?
You have to ask yourself what a good God is after in creating people at all. The Bible tells us that He wants children, and that people are designed to be His children. So, let's examine this, briefly.
If you have children, but they hate you, ignore you, don't give you credit even though you are supporting you, don't thank you, try to say that you don't exist, kill each other off, and all kinds of other things that you don't want your children to do, how would you feel? Sure, God is way more patient than we are. But He is way more sensitive, as well.
Is God getting the thing He wants? If He isn't, why in the world would he want this creation to remain. Do it over in such a way that He gets what He wants. And... He is God, so He is doing exactly
that.How is He doing it? By finding those people who are somehow willing to believe in Him, and be His children. Then, by letting this universe be destroyed, and taking His kids to the new universe He is making. His enemies - the kids who don't want Him - go down with the destruction of this universe.