Unless you start in first place, to get to first you need to begin by getting to second.
Interesting that there is one county somewhere where Christianity is only the second-largest religion. Does anyone have any ideas where that might be?
It also helps when you lump all sects of Christianity into one group. Basically what the map is saying is that a state can be 98% Christian, 1% Muslim, and 1% everything else. Hardly a threat.