It's been my experience that, particularly among the more fundamentalist sects, Christianity isn't about having a genuine relationship with God, about obeying His laws or accepting Jesus. What really matters is that God is (supposedly) perfect, and you're not. It doesn't matter how much good you do in life, you can never be as good as He is. So if God decides when you're standing at His throne that you didn't do enough to earn heaven (whatever that is), He's fully justified in sending you to hell. I've heard from more than one Christian that, from God's perspective, we're not even worth saving anyway! (and yet they also describe this God as being the epitome of mercy and justice?)
That is a false representation of fundamental Christianity. Either you knew that or was very ill-informed. Yes we are not good enough on our own to be accepted by God. That is why Christ paid our sin debt. Once you acknowldge that and trust in Christ for that, then you are a Christian. Anything beyond that may be viewed differently but is not a basis for salvation. That is why I may disagree with someone not recognizing that the gifts of the Spirit are active today but agree they are a Christian if they follow the above I mentioned about Christ and His death and Resurrection. It all comes back to Christ and His death.
If you run into someone who claims to be Christian but denies or finds the death and Resurrection unimportant then it is a very very good chance that person is not Christian, in the traditional sense.