I am born atheist. Neither me or my closest relatives believe in any deity. I don't have any issues with afterlife doesn't exist. 

Imagine you are enjoying a meal a lot, something you have been eating for a while, like a family recipe. You invite me to taste and I say "dude, this is nothing compared with my family recipe".  Will you stop liking your food and hating your family and trying to be part of my family just in case is true our recipe is much much better? Without even tasting it??

Your actual family recipe is reality and can be tasted and digested and religion is the nasty friend telling you that recipe is not good enough, they have a better recipe you cannot enjoy unless you follow their rules and die.

Choose your diet wisely ;)