Palin is one of the most popular figures in the country among conservatives, and she is very open about her support for Israel and for Jewish Americans and Israelis. She often wears a Star of David or an Israeli flag. That has been part of her life for many years, with the Israeli flag (last picture) in her office well before she became a national figure.
In more general terms, this comment from the Democrats is a lie, and it's a stupid one to bring up given that it draws attention to the disgusting behavior of DNC delegates yesterday. The DNC is about 50% anti-Semitic bigots who booed the idea of having even one mention of God or of Israel in the Party Platform. I think this comment was intended to deflect attention from their open bigotry, but it will almost certainly fail. Conservatives, and especially Christian conservatives, are pro-Israel, pro-Jew, and pro- freedom. We are not the ones who trample the religious rights of our fellow Americans - that is Obama and his people.