The only land Israelis are so-called 'annexing' is land they conquered in 1967 in the Six-Day War when Israel successfully defeated Syria, Egpty and Jordan all supplied and funded by the other Arab nations. The intent of the Arabs was to annihilate the Jews and take all the Israeli land for themselves. In time Jordan and Egypt made peace with Israel but the Palestinian leadership would not. Israel has time and time again entered into peace talks with the Palestinians offering to return all that land except for the Golan Heights critical to its security, but each time the peace talks broke down because the PALESTINIANS would give up nothing--most especially their intended right to obliterate Israel and take all the land. And after awhile, the Israelis also gave up trying and just started using the land for themselves and took whatever measures were necessary to protect and defend their own people.
The Arabs don't care a diddly squat about the Palestinians or they would denounce placing weaponry among old men, women, and children and they would have long ago carved out a tiny parcel of land that any one of those countries could easily spare as a homeland for the Palestinians. But they keep the Palestinians in stress as leverage to generate world opinion against the Israelis.
It's just nuts.
Israel is about the size of a western U.S. county at roughly 200 miles long and 70 miles wide at its widest point. They don't bother anybody who leaves them alone. How could such a teensy place be ANY problem for the Arab world other than they just hate Jews and want them gone?