Deeply offended by comments from my non-Jewish husband

I'm very hurt and offended by something my non-Jewish husband said this morning. However, I don't know if I'm overreacting so I'm reaching out to the tribe for some input. I am a secular American Jew who is very pro-Israel. Like so many of you, the events of Oct 7 shook me to my core. Since that day, my husband has been very supportive of me. He doesn't know much about Judaism or the history of our people but he's never shown even the slightest hint of antisemitism.

A few weeks ago he bought a book about the Palestinians. It's written from their perspective about the founding of Israel. He said he wanted to learn more about their perspective. I can respect that. The problem is, this book apparently starts the story in the late 1800s which I think is crazy because the history of that land and the people in it goes back thousands of years. I don't think you can understand the current conflict without understanding the full history, and I told him that.

Well, this morning he basically told me that when the Jews started arriving in Palestine in the late 1800s they slaughtered many of the Palestinians and pushed them from their land. And that even though Jews have had a presence in that land going back thousands of years, it was too long ago for it to "count" as giving them current and legitimate claim to the land. It's not that he denies the Jewish history there, it's that he thinks they were there so long ago that it's pretty much moot at this point. He also isn't saying anything along the lines of, the Israelis need to leave or the country should be dismantled, etc. Or that they don't have a right to defend themselves when they're attacked. He was just saying that at some point there should be a sort of statute of limitations on how far back in history you can reasonably go to give people claim to land they once lived in.

I started to cry and told him what he said was very offensive. And that the history of Jews and Judaism are so intertwined with our connection to that land that to say we were there too long ago for it to "matter" is an affront to the Jewish people. I also told him he should go join the "river to the sea" crowd that calls Israelis colonizers. He seemed very surprised by my reaction and tried to talk to me about it but I'm too upset. I don't think he understands why I'm so hurt by this and frankly, I'm not sure why I am either. (I also have horrible PMS and am taking Prednisone for an illness, so perhaps that's clouding my judgement and reaction to this).

I'm curious to hear from you all. Am I overreacting? Is what he's saying as offensive as I think it is? Does he have a point?

ETA: I talked with my husband, see comment for update.