As long as you are arguing that his endorsement matters, you are arguing from a purely emotional point of view. Logic doesn't enter into your argument for even a second. At the end of the day, I couldn't give less of a shit how his endorsement makes you "feel".
I am much more concerned with the policy. How he votes, and what effect he has on his colleagues. His record is not by FAR the best and closest to Ron Paul of every other senator, to say anything else is simply a lie.
To summarize...stop making your decisions based on rhetoric and emotion.