I've made the same point in the past. When some Freepers wondered why so many Jews are Democrats or liberals, I told them because many Republicans from the late 1800s and early 1900s were anti-Semitic. They also weren't real fond of the Irish, Italians, or the Chinese, but they explicitly discriminated against Jews.
The real conservative movement as we know it really started with W. F. Buckley and some of his pals who eventually kicked the Birchers out of the party for their anti-Semitism. And of course the first really ideological conservative candidate for president was half-Jewish Barry Goldwater.
Today, most of the right-wing anti-Semites are found at places like Taki's Mag and outright racist websites. I check both the far right and the far left to see what's going on. Both are full of nuts.
in western Europe almost all of the antisemitism comes from the hard left, most of west europe “far right” is like geert wilders who are pro Israel . Eastern Europe is another story though