Bullshit! All their exports and imports are restricted.Only the things that can be used to hurt people.
And why can't they have weapons?
Are you saying they have no right to defend themselves?
Because the weapons go to Hamas and Islamic Jihad, who have sworn on many occasions to destroy Israel, if it's the last thing they do.
It's not Israel vs. the Palestinians, it's Israel vs. Hamas and IJ. They are in a state of belligerency and if one of them can stop the other from acquiring weapons, then too bad.
Hamas is more than welcome to try and stop Israel from acquiring weapons from the U.S.

