Can I ask this? You don't believe in it, so why does it matter to you that someone else does? Is that not for the someone else to reconcile?If you accept that your path is true, your God is the true God, and that God is just and merciful, then you also accept that people going to hell for not choosing the correct path out of millions of paths to be fair and equitable. You accept someone's eternal damnation as just and righteous, as acceptable punishment for not following your beliefs. This is the price of believing in this ideology where hell exists.
I think there is an investment non-religious people have in religious people. It goes along the lines of.. if so and so was a real Christian then so and so would be like this.. insert non-believers examination of what a real Christian should be. Why do you care?
I will answer your question though. I don't want eternal damnation for others but I think it exists.