There are a couple of sectors within the party. One sector is hard core RR. Another is a moderate evangelical sector. And then there are the secular conservatives who are pretty much party first. None of these sectors is 100% one way or the other. But for the most part, there is a pattern within them.
we need all of them to win. so it doesn't pay to offend even a small percentage of them over an event like this.
Identifying the extremists as only Christians isn't accurate. There are many secularists that share the same stage. Militia groups, bigots, etc...
Nor would I give them more than a few percentage points of influence. Certainly they have nowhere near to a clean 1/3rd of the ear of the Party. For the most part they are ignored by everyone except the MSM that loves to stir a certain image of Republicans/Christians to the masses.