I think you got that backward. It is they who want to rid the Party of those of us who believe that prayer in school, evolution, stem cell research, and homosexuality are not the issues of importance to most Americans. Nor is that 42% you quote remotely representative of the much smaller activist religious right that is attempting to play a major role in the electoral process.
In fact, I welcome all into the Republican Party, the Party of Lincoln. It is the religious right that wants it cleansed of anyone not committed to a Christian oriented nation.
This is NOT true.
What WE want is a LEADER who has a bit more 'morals and justness' than the AVERAGE Joe on the street.
We might even let YOU be that guy, if you indicate values that we like.
There are very few of us stupid even to think that only CHRIST in office is acceptable in this world.