Sen. Schumer is simply acknowledging the fact that Jews have a deep historical tie, thousands of years old, to the land of Israel. The Palestinian Authority routinely denies Israel's right to exist, and thus don't allow for any serious peace agreement to be reached. I don't defend Chuck Schumer on many things, but he is not wrong in this case.
The Palestinians' tactics is ti incrementally weaken Israel because, at heart, they wish to drive the Jewish State into the sea.
You cannot hope to have a lasting peace with an enemy who, at their core, wishes your total destruction.
That to me has always meant nuclear destruction. With the help of Iran, the Palestinians want Israel off the face of the Earth.
https://www.youtube.com/watch?v=QsB83fAtNQE When comparing Israeli's and Palestinians, one party has nuclear weapons and does not want to use them whilst the other is seeking nuclear weapons and will use them on the first day they become available.
Ultimately, the only logical conclusion is Israel will defend itself by whatever means necessary to avoid this scenario.