See, the problem is this. On the issues I hold dear Rudy has said, publicly, he differs little from what Hillary has said her views are. Also, we don't know Rudy's foreign policy plans, or Hillary's for that matter. We can make some inferences, which may or may not be valid, but we don't know.
As a Christian, I believe that we will answer for our actions, and there are some things that can not be justified. I personally believe that abortion is one of those "trip wires".
As a conservative, I am also very much in support of gun rights and limited government. Neither of the currently MSM annointed candidates are for that. Both are for gun control, and expansion of government.
So that leaves foreign policy. Of which we have very little data that Rudy would be better than HRC.
It would depend on his opponent, and what this switch really meant re: Rudy's personality and makeup. Possibly, possibly not.
My fear is this. Many people are pushing Rudy as the anti Hillary with out looking at his views and positions. He has much more in common with her than he does with the current president.
So basically what you're saying is that between a Giuliani Presidency and a Clinton Presidency, you have no preference whatsoever. In that case it's perfectly rational for you not to vote (or to vote 3rd party). But is that truly what you believe?