Visit the Temple site in Jerusalem, there are guided tours in several languages.
Read any one of Josephus’ works.
The NT was written not long after the events it describes.
Parts of the Talmud, written in the following centuries,
discuss the Jewish Commonwealth and Jewish life there.
There is no other people which has a historic connection with this land
and has never forgotten it, nor abandoned the hope of an eventual return.
It’s in the Bible, the Talmud, and medieval Jewish halachic and poetic literature.
It’s in Jewish prayers, holidays and ceremonies.
Denying the connection between the people of Israel and the land of Israel
is silly and counter-productive because it prevents
a peaceful, agreed end to the present conflict.