Although Ron Paul wasn't very specific (He didn't want it to blow back at Rand) as far as I understand it, Ron was voting for Johnson for President, who although not perfect himself, was a far, far better choice than Romney. Then again, Ron also didn't have a career to protect at the time.
Fair enough on tax increases.
Regarding sanctions, I didn't say they were an act of war, Ron Paul did. I'm not sure what sanctions actually entail, but if all it is is that the government won't trade with another government, than I would not say that this is an act of war. If, however, we prohibited private American markets from trading with Iran (Like we are doing with Cuba) I would consider this much more of a serious issue. Either way, I know sanctions have caused a lot of pain and suffering in Iran, and I don't really see it as worth it. Rand should have voted no. But that may have been bad political strategy. I can't blame him too much.