> The Arab petrostates and their citizens regularly support all kinds of Sunni terrorist organizations.

The US supports all kinds of Sunni terrorist organizations.

> During the Syrian Civil War, it was a common knowledge that certain islamist groups were funded by certain states, and the states were competing with each other in this regard on the battlefield.

This is the US again. Not only that, but proud of it. We put Jalani in a suit and have Petreus give him a Barbara Walters style celebrity interview. The US poured more money into using Al Quaeda to topple the secular regime and turn it into an Islamic state than anyone else. If you believe Hillary Clinton's leaked email, we've been funding them since at least 2012.