Color Me Confused

I was listening to a podcast the other day and one of the hosts is Jewish. They said that support of Palestinians is antisemitic. There’s the source of my confusion. To me it would be like saying all Americans are racists because the KKK is a hate group, right? In my mind there is a big difference between Hamas and Palestinians, or are they inseparable? I cannot imagine the answer being “Yes, they’re inseparable.” The way I see things right now is the Palestinians are being exterminated. How in the hell can a people who were being exterminated by Nazi Germany do the same thing to others? It does not make a lick of sense to me. I have zero problem with Jewish people. I have zero problem with Palestinians. Zero. Reach out. Explain it. I really want to understand. If you’re nasty about it I’ll ignore you. Thanks.