Which Arab nations are Joe Biden currently exterminating, then?

https://responsiblestatecraft.org/2021/05/24/ronald-reagan-wasnt-afraid-to-use-leverage-to-hold-israel-to-task/

In addition to not vetoing UN resolutions, Reagan took several actions that many in Israel and the United States perceived as anti-Israel. For example, on June 7, 1981, less than six months after Reagan took office, Israel launched a surprise bombing raid on the Iraqi nuclear reactor at Osirak, and, in so doing, violated the airspace of Saudi Arabia and Jordan. Reagan not only supported UNSC Resolution 487, which condemned the attack, but he also criticized the raid publicly and suspended the delivery of advanced F-16 fighter jets to Israel. Moreover, over the strident objections of Israel and the pro-Israel U.S. lobby groups, Reagan approved the sale of advanced reconnaissance aircraft (AWACS ) to Saudi Arabia, which Israel then viewed as a hostile state.

A year later, in August 1982, when Israeli forces advanced beyond southern Lebanon and began shelling the Palestinian Liberation Organization (PLO) in Beirut, Reagan responded with an angry call to Israeli Prime Minister Menachem Begin, demanding a halt to the operation.

In addition, during the Israeli invasion of Lebanon, Reagan intervened directly when Israel threatened to blow up the Commodore Hotel in downtown Beirut, which housed more than 100 western reporters. As David Ottaway, who was then the Washington Post Middle East correspondent and was in the building, pointed out, the Israeli defense minister did not like the media coverage the invasion was getting and wanted to close down the media center.

Biden, on the other hand, even though he had an hour’s notice, failed to intervene to stop Netanyahu from bombing and collapsing the 12-story building that housed the offices of Al Jazeera and the Associated Press in Gaza during the recent bombing campaign. He also failed to publicly condemn the attack, let alone challenge Israel’s contention that the building sheltered Hamas military intelligence assets, despite AP’s insistence that its staff had no evidence that such assets were or ever had been present.

In addition to allowing the UN resolutions to pass and suspending the F-16 delivery, Reagan also restricted aid and military assistance to Israel to help force its withdrawal of troops from Beirut and central Lebanon.

Therefore, if in the future some members of the Biden administration or Congress want to join the international community in condemning Israel’s behavior, or in conditioning U.S. assistance or arms transfers and face resistance from Republicans, they need only point to the precedents established by President Reagan in the first instance.

Maybe

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Stop sending billions in bombs to them knowing they're gonna blow up Palestinian kids with them.

Israel is a client state of the US. Biden could simply threaten to revoke aid and they would immediately stop the bombing. Their defense minister said so outright not long ago.

Liberals tell you they're powerless so they can pretend to be good people who simply have no means to stop the status quo. Don't believe them on either part.