I think that's a tad hyperbolic. Romney doesn't agree with you on a limited number of items on your list. Obama doesn't agree with you on almost every single item. Just something to ponder. The way I look at it, better to concede a few things to someone who's broadly in agreement with me (Romney), than to lose everything to someone who wants to take everything I own from me and hand it over to his favorite causes (Obama).
Conservatives would benefit greatly if their party had an ideological litmus or purity test; that is if any would-be candidate does not meet/pass then gets banned by law from running.
I think the same should apply to voters: they must be either pure conservative or pure progressive in order to vote or join one of the two parties. Moderates and independents should be purged and prohibited by law from voting.
The GOP obviously needs a good-old-fashioned Soviet-style purge of moderates/independents and non-conservatives.