It is incredibly messed up to assume that because you are a Christian, your life will not be shit one day. Because what you are saying is that every time something bad happens to someone, they somehow deserved it. What you are saying is that they did not pray hard enough.
It's incredibly offensive.
Telling someone who just lost a loved one "I hope he was a Christian" is offensive.
Asking someone who just lost a loved one "Did you guys tithe regularly?" is offensive.
It's always odd to me that the ones that claim to be full of Christ's love are often the most judgmental, inconsiderate, self-righteous people on the planet.