Many greens are anti-Semitic and are involved in boycotting Jewish goods, etc. They are also anti-Christian ...
Some forms of conservatism are necessarily antisemitic.
That doesn't mean that those of us who are conservative or libertarian and NOT antisemitic should stop being conservative or libertarian.
If some people are not buying certain "Jewish" products it's most likely because those products are made in Israel and those people are just anti-Israel, or opposed to Israeli domestic or foreign policy. Being opposed to Israeli domestic and/or foreign policy is not necessarily antisemitic no matter how many neocons claim it is.