I'm having a problem with modern Christianity...?

I know this 10 year old kid who goes to school with my little sister. I seriously think that objectively he might be the greatest kid in the world. He's super smart, and can already do intermidiate algebra (Seriously, I gave him a test that I took for college, it was mostly complex application problems and he got an 87%) Plus he's MEGA cute, like I've never seen a kid who looks like him. He's also super fast in track and really good in other sports like football and basketball. And he's just hilarious/creative/sweet. I remember we were walking home from the park and a dog just recently hit by a car was dying on the side of the road and he was so empathetic with it he started crying and petting it, and he waited with it until humane society came. He's also very generous, he found out my little cousin didnt have a game system so he gave him his X-Box and all his games. But I've talked to him before and he doesn't believe in God, neither does his dad. It's not his fault, if you were born into his family you probably wouldn't either. He's a good kid, and will grow up to be a good person. And if belief is that important to God, then why doesn't he just show up? If he truly wants to save people. If he truly loves my friend why doesn't he show up? Why do lot's of preachers teach that good people mean nothing and only belief is important? Shouldn't it be the other way around? This is why as I get older, and meet good cool people of all faiths, I can't help but to hate what modern Christianity teaches. I still consider myself a Christian but the God I know wouldn't allow good people to go to hell.