I think they already knew that the US had a pro-Israel bias at least since 1967.
In 1967 Lyndon Johnson told the Israelis they were on their own, no U.S. aid. Israel became popular in America after their stunning victory but it was only in 1973 that Richard Nixon came in solidly on Israel’s side with a massive airlift that probably saved the country, and from that point the U.S. & Israel were de facto allies.
Tomorrow has been looked forward to for far too long. If the Pallies rush the border & the IDF responds with force, it will only prove the point that Israel is beset with savage enemies as much now as in 1948.
Long live Israel! Thank you, President Trump.