Your first comment was downvoted because "I've never heard of conservatives hating Jews" is similar to "I didn't know the sky was blue". Racism is one of the defining features of conservatism, and frequently being faced with racism is one of the defining parts of Jewish history; see also the Nazis.

Your second comment was downvoted because conflating opposition to Israel with antisemitism in order to accuse the left of antisemitism is a common right-wing tactic