I wouldn't worry to much about it, if you are talking Judaism, Christianity or Islam, it is made pretty clear in the scriptures what will happen to those of wrong faith. This is something that all religious people automatically accept and choose to live with or they close their eyes to it and ignore. Judaism is probably the most humane of these, in my opinion.
I don't really think that, the way you are thinking about it, was the way it was intended to be thought of
But rather it should make you feel special and privilege that you are not part of those that end up in hell. After all God knows best right? so he probably have a good reason for throwing us in hell
I actually remember when I had a talk with a JW and at the end, when she "gave" up trying to save me. Which is basically what their goal is by spreading the word of God, to make sure that people can be saved and go to the new Earth, where everything is perfectly fine, with no suffering and evil etc. before the apocalypse.
But I had gotten to know her sort of well over the two years of chatting, so I asked her how she would feel going to this new Earth knowing that she had not been able to save him and whether she would feel guilty or not, and how that would work with the new Earth, unfortunately I can't remember what she answered. But I think its a question that all religious people have to deal with.
If you are saved, how are you going to live in heaven or the new Earth or wherever you go, knowing that all your friends, family etc. are spending their time in hell. Imagine you lived everyday here on Earth, knowing that somewhere your parents, maybe even your child or some of your friends were being tortured 24/7, and we are not just talking waterboarding and being slapped around a bit here. While you sit here writing posts, drinking a cup of coffee and in general having a nice day.
Honestly for me, I would consider such life close to being equal of that of hell.
And even if God make it so you can't remember anything, then they are still being tortured, God just "made" you look the other way. I don't know how religious people work that out, if they believe in hell.
So again I really wouldn't worry to much about telling people they have wrong faith or beliefs, by choosing one of these religions, you automatically sort of accept their fate anyway, how you are going to live with it, would worry me a whole lot more, if you ask me, to be honest.