Ludwig: you do have valid points, however your attempt to portray the Democrats and their platform as tzaddikim is obviously far from the truth as other posters have pointed out.
The Torah hashkafa carries a mix of ideals from the Right and the Left. I think if we are going to try to align ourselves with any Non Jewish political ideology, then we do best with identifying with the Centrists or Independents. As you quoted from pirkei avot: Rabbi [Judah HaNassi] would say: Which is the right path for man to choose for himself? Whatever is harmonious for the one who does it, and harmonious for mankind. I think the Centrists platform fits that quote best.