isis was created by the us and its saudi and kuwaiti allies from freed iraqi criminals after the 2003 war. they were used as "moderate rebels" in the 2011 libya war and are known to get healthcare, weapons and training in turkey, a nato member. they always attack us enemies, but almost never us allies. israel in particular is known for having a surprisingly positive relationship with them, as they even apologized to the zionist entity for accidentally attacking them. the trump administration also murdered general soleimani who was instrumental in fighting against daesh and biden is continuing this pattern.

What was it... Operation Timber Sycamore? Where USA supplied weapons got "oopsided" into the hands of the ISIS groups operating in Syria against the Syrian government.

Also... ever wonder why ISIS only seems to attack places that the USA is opposed to militarily? How often do we hear of ISIS attacks on US Troops in Saudi Arabia, Quatar, Kuwait?

https://thecradle.co/articles/ex-isis-chief-appointed-as-commander-of-us-backed-militia-in-syria

https://en.wikipedia.org/wiki/Ajnad_al-Kavkaz

https://en.wikipedia.org/wiki/Timber_Sycamore

https://en.wikipedia.org/wiki/September_2016_Deir_ez-Zor_air_raid

https://www.haaretz.com/israel-news/2017-06-19/ty-article/israel-reportedly-providing-direct-aid-to-syrian-rebels/0000017f-f06c-d223-a97f-fdfdfef50000

CIA has been arming them for a long time against Syria and Iran in its proxy war in the Mid East