Yacov, I agree with you in spirit, but not necessarily in practice. I agree with you that Obama is the worse choice of the Democrats (not because he is a black Muslim, because Hitlery is a white woman whose views and philosophy are identical to those of black Muslims), because he is liked by most people and has considerable crossover appeal to "Republicans" (40% of Republicans voted for him during his first Senate run in Illinois in 2004, and a huge amount of his votes in this primary run have come from "Republicans").
In practice, there is very little difference in the evil factor of the three (him, Hitlery, and McCain), and I don't think this is really that productive and worthwhile a use of our time.