In my opinion, The Squad is not loved by the Left, including the young Left. In my observation, the Right has antisemites and absolute racists in Congress, openly so, and I would not estimate the number of antisemites to be greater on the Left.
Of note, it is not inherently antisemitic to express caution over military actions in Gaza. You have made it clear that you do not have a high opinion of Palestinians and believe most champion attacks of Jews/Israeli’s. Being of that opinion, it’s easy to understand why you see things the way you do.
A reality does exist - and is not unlikely - that most Palestinians are normal humans who do not support the killing of others and would prefer not to be killed. These Palestinians are likely to be killed as collateral damage in a higher percentage than those who support aggression against Israel, Gaza is a messy situation and collateral damage is inevitable. Misguided hopes for peace in the region at the expense of Israel proactively removing terrorists (at a high civilian cost) are not antisemitic. It’s not a matter of valuing other lives over Jewish lives, or Jewish lives less than other lives. It’s a matter of valuing life, in a probably misguided and short-sighted way.