The lynchpin issues I see are the war/defense, abortion, guns, and combination of the border and illegal immigration (can't separate those, really).
Then Rudy should be acceptable to all, exept on the 'abortion' issue. Gun control there's a likelyhood he won't do anything, and on the borders he's no worse (or better) than GW.
The war/defense, of course, he'd likely be excellent with.
I think opposing Rudy in the primaries is great, fine, no problem. But when I hear socials threatening to bolt the coalition because of abortion and gays . . . let's just say that's outside the agreement we have that keeps us all together. Many people who believe in the conservative use of federal power do *not* share their social views.