In recent years, the US and the UK were airdropping weapons to ISIS every other day, especially in Anbar. Local tribes reported this many times (in fact, they were issuing reports that the US was airdropping weapons to ISIS about every other day), and it was even brought up repeatedly by Iraqi government officials who complained the the US and UK were directly supporting ISIS. The British were even caught red-handed in a weapons drop to ISIS. They made up some fake excuse claiming it was a mistake.
The US and UK hate the Iraqi government because it is seen as a pawn of the hated Iran. Many Iranian or Shia militias fight alongside the Iraqi Army.
At the same time, the US was arming and flying combat support missions to support the Iraqi military in its war against ISIS.
Ideally in a situation like this, the US wants the war to go on forever since they hate both sides and want to bloody both of them.
This was also the philosophy in the Iran-Iraq War when the US armed both sides since it hated both Saddam’s Iraq and Iran. The US also altered back and forth, supporting Iraq one minute and Iran another, with no logic behind any of it.
The US has repeatedly armed the Kurds to fight the enemies of the US and then turned around helped arm US allies who were fighting the Kurds. So we gave the Kurds guns and then we helped kill them.
This is a Deep State/CIA game – arm both sides and watch them slaughter each other. The Deep State is also based on profound hypocrisy when Kurds are armed to fight Iran and oppose Assad, while at the same time, the US supports Turkish attacks on the Kurds in Turkey and even in Iraq, which the US refers to as terrorists.
In fact, the Syrian and Iranian Kurds armed by the US are the exact same people as the Turkish and Iraqi Kurds who are called terrorists and who the US helps attack.