No. Casting votes against unconstitutional bills is not the same thing as endorsing a warmongering statist for President. “Holding his nose” means doing something that is unpleasant or that you would rather not do, so that you might achieve some more desired end. (It comes from the concept of literally holding your nostrils together so that you cannot smell (and therefore cannot taste as much) the bad-tasting medicine you need to swallow.)
I would pretty much guarantee Ron Paul quite happily votes against all that government growth and introduces all those government-shrinking bills…not to mention being able to make thespeeches he does on the Floor. I would even venture to say he might even enjoy it (even if it does get tiring sometimes).