I wouldn't support Rudy solely because he might have the best chance of winning (although, since this is an election, one has to wonder about the wisdom of supporting someone who has NO chance of winning).
However, that is quite different from not supporting Rudy solely because he is not on point with me on a single issue.
You are accusing Rudy supporters of reasoning, "The heck with his positions---if he can win, let's vote for him!" That's way too simplistic. The idea is to see how much you can get off your wish list by voting for a guy who also has a chance to win. It's a balance and it's absurd to suggest people who are not single-issue voters want to win even at the cost of ALL their political goals (as in electing the Hildabeast).
IOW, winning the election isn't everything, but it is one thing.
OTOH, those who refuse to vote for an otherwise electable candidate because he can't/won't deliver on some litmus test issue treat *winning* on their issue as everything and *losing* an election as nothing.
Those are the folks who, in practical effect, truly are "voting" for Hillary, not the people who realize that politics involves some compromise and, further, that it's irresponsible and poor stewardship to deliberately throw away one's vote.
Finally, to say people here who don't agree with you would vote for Hillary if she registered as a Republican is not only beyond the pale, but ridiculous, in the fullest sense of the word.
You simply don't understand that its Rudy that has NO CHANCE of beating Hillary, so I question your wisdom.
There are people, a whole darn lot of them, who are registered to vote but aren't political the way you and I are. They look at the candidates and if they see someone on the ballot they like they decide to go vote. If it's someone who really inspires them, they go out in the rain, and they bring a vanload of family and friends to the polls. Most of these people are moral conservatives. If there is no one appealing on the ballot they simply take a pass. Not out of spite, not to send a message, not to "get back" at anyone. They simply see no reason to go to the polls. Like it or not, that's the way it is. In recent years they've done a lot of staying home.
With a strong moral man like Reagan on the ticket, they will come out of the woodwork to vote on election day. In these times of a hairline split electorate, the GOP needs someone with some of that appeal. Rudy as the nominee will throw cold water on such people. While Hillary on the other side will be motivating the commie leftists who often stay home in a way John Kerry and Al Gore never could.
Giuliani will never be President.