You are exactly right. I have dropped out of the Repub. Party, and people of true moral principle are dropping out every day. The Question is: Can the Republicans survive without the support of evangelical Christians? The answer: NO - that is their base which they have ignored! Watch out - James Dobson (a man who millions of Christians respect and whose advice they follow) has hinted in the past that he may abandon the Republican party - and millions will follow him. At that point, the Repub. Party will go the way of the Whigs. Kaput.
If James Dobson abandons the Republican party (which I highly doubt), where will he go?? To the dope smoking, no laws Libertarian party?? Not likely now, is it?
Best bet, ex. Work within the party and keep its platform morally strong.