I recently learned there was actually a NAME for this logical fallacy that you are using as an argument:
It's called the No True Scotsman fallacy.
You argue that "no conservative" would do something. But when it's pointed out that there are conservatives which ARE doing something, you then say "well no self respecting conservative", thus asserting without evidence that anybody who disagrees with you has respect for themselves.
Lots of conservative, self-respecting and otherwise, are supporting Romney. His list of endorsements is large, and the list of well-respected conservatives who say he is ACCEPTABLY conservative is essentially composed of ALL of them. You'd have an easier time making a list of every repsected conservative who said Romney was UNACCEPTABLE, because you couldn't list all the ones that find him acceptable.
And in the real (non-FR) world, they would laugh at your suggestion that Ann Coulter, Laura Ingraham, Rush Limbaugh, and Mark Levin are not "self-respecting conservatives". OR that John Wilke, Robert Bork, Senator DeMint, or Tom Tancredo are not "self-respecting conservatives".
There are simply too many examples proving you are wrong for anybody to take your assertion seriously.
I don't care if Joseph Smith himself endorsed that slick liberal from Taxachussetts, he is going nowhere.