so right,
Check out the Republican named Jim Russell who is running against Nita Lowey for the 18th Congressional District in New York. He wrote a paper that suggested that it was important to keep the population of Jews to a minimum — a paper that was promoted on the web site of none other than David Duke! At least the Republican hierachy has distanced themselves from him, but the fact that he has managed to win not one but two Republican primaries might cause me to question whether Republican voters are all sympathetic to our cause. In contrast, Lowey is a pro-Israel Democrat.
Or check out John Dennis, the Republican running against Nancy Pelosi in the 8th Congressional District of California. Pelosi has been pro-Israel even though she represents one of the few congressional districts in America where that loses votes. Dennis, on the other hand, is an openly Gay supporter of same sex marriage who is an admirer of the famous atheist hedonist Ayn Rand and the anti-Semite Ron Paul who is supporting his candidacy.
Also, McKinney is no longer a Democrat. I personally contributed to the candidate who defeated her in her last Democratic primary, so it is not incorrect to say that we Democrats threw her out. Also note that none of the other names you mention have ever been elected to anything. Duke, on the other hand, served in the Louisiana legislature. (To their credit, most prominent Republicans actively opposed Duke, but you wonder how such a person can get so many votes.)