If Paul were the nominee, 90 percent of the Republican establishment leadership, including the Big 4 favored by the media, would all en masse endorse HRC.
Needless to say we'll never know.
I presume your point is that most Republicans are actually Democrats. Actually, the problem is that Ron Paul is not a Republican, he simply runs as one. He's out of touch with the party who's nomination he desires, that he's not accepted shouldn't surprise anyone.