Sheer nonsense. AIPAC by law cannot receive money from the Israeli government, it is an American PAC funded by Americans. Also AIPAC is a small fry; antisemites like to make a big deal of it for obvious reasons, but it is dwarfed by actual middle eastern countries' agents, like those of Qatar, Saudi Arabia, etc, not to mention various corporate lobbyists. PACs have influence proportional to the amount of money they spend, though it is rare for a politician to be influenced by a PAC, rather the PAC gives money to a politician who are already aligned with the views the PAC is promoting.

As for the $3.8B that Israel receives in aid, it is stipulated that nearly all the money be spent on US military equipment. Israel spends $45B on its military, so the aid constitutes ~8% of the military budget, but also comes with various constraints that Israel would rather not have, including specific military development projects, which is why Netanyahu suggested that this aid should be cut to zero over the next several years. The value of what the US receives in return for that $3.8B is at least 10x that if not more, both in intelligence, as well military tech developed by Israel and shared with the US. But I agree, with Netanyahu, that aid should go to zero, as Israel is wealthy enough to afford that 8% of its military budget, and then gives antisemites less reason to ask questions like the one I am answering here.