I’m not an expert either, but I am interested in history (and old enough to remember quite a lot of this from when it happened in the 70s and 80s).
What I do know is that there was never such a country as Palestine, and indeed the early zionists were referred to as “Palestinians” while the Arabs were the Arabs. It was only from the time of Yasser Arafat (born in Egypt, not in Palestine at all) that the Arabs quite controversially switched to the marketing ploy of reinventing Palestine as being the Arab population of what had until then been “Cisjordan”. I remember that being the name used in the news. What’s now Jordan was Trans Jordan.
And the original Arab plan, when they rejected the creation of Israel by UN mandate, had been to integrate all of it into Greater Syria, not to set up a separate country. And when Gaza was ruled by Egypt from1948 to 1967, nobody complained that Gaza wasn’t getting fair recognition as part of Palestine - what they complained about was that they didn’t want Israel to exist at all. But I don’t think anyone cared that Egypt was running Gaza. It was only the Jews they couldn’t stand.
To come back to your original point, Zionism is literally the concept of a homeland for the Jews in Israel. Nothing else.
As for the regular allegation about them wanting more land, has anyone ever looked at how much land Israel conquered and then handed back in exchange for peace? Israel came out of the 1967 war in possession of the whole of the Sinai peninsula. They gave it back and since then have been at peace with Egypt.
Same thing with Jordan: why did Israel invade south Lebanon recently and not western Jordan? Maybe the fact that Jordan years ago expelled the Palestinians who were trying to use Jordan as a base for attacking Israel (massacring thousands of them in what’s called Black September, but nobody hates Jordan for that, oddly)? IOW Israel was not being threatened by people on the other side of the Jordanian border, so it didn’t attack them. Same as Egypt.