He ended his aspirations over a confirmation vote for a cabinet secretary? Gimme a break. Who is more pure for you? Amnesty Rubio? Or perhaps we can just repeat 2012 and run a bunch of single issue conservative candidates to split the vote and wind up getting someone like Jon Huntsman or Jeb Bush.
When Paul voted to confirm Hagel he confirmed his own anti-Semitism, in general conservatives do not support anti-Semitics.