1) people will often resort to perfecting religious practices to appease angry Gods as ISIS is doing now
2) they get paid plenty for their oil based on world free market oil price, not based on imperialism
3) they are backward only because liberals have prevented them from adopting capitalist values by blunting the shot heard around the world. Liberalism is a growing cancer on the world.
I'm sorry but what are you talking about?
ISIS are not appeasing angry Gods.
As for the money they're getting from selling oil, I doubt that's anywhere near the money they get from US allies who are spending money on these people.
ISIS Receiving Funding From U.S. Allies - Business Insider
"ISIS Is Likely Receiving Funding From People Living In Countries Allied With The US"
As for why they are backwards, I'm going to have to give you a history lesson. Remember, people lived there before the Iraq war in 2003, and even before the Kuwait war in 1991, and even before WW2 and even before Iraq was made a country by the British. Okay, I'm being sarcastic, so I'll stick to the real situation.
They haven't been prevented from adopting capitalist "values" by liberalism.
The main reason they are backwards is imperialism and the impact this had on Islam.
Muslim countries.
Look at the Muslim countries, then look at the imperial map. A lot of pink and blue there. What does this say?
Most Muslim countries were either occupied by the British or the French.
Take Iraq, the British made the country and appointed a Saudi as king. Egypt had a puppet govt, British India was controlled by the British. In all cases they were there for a reason, to make money. They impoverished the people and made themselves rich.
Now, what happened when the British and the French left? Disaster is generally what happened. You can't just build from nothing and expect to get to high levels really quickly. The imposition on democracy didn't help either.
The Cold War was a massive problem for these countries. Being pushed and pulled, with money going to whoever sided with either side, and this money being sent without any sense of reality. Often it was pocketed by the ruler and sent to a Swiss bank account. The US didn't care, the USSR didn't care, as long as they go support for their view.
I was in Egypt in 2001 and was visiting someone. They had a friend who worked in a school funded by the US, and they taught anti-American stuff. Proper education was not considered. You have to ask why this was. Why was the US funding such schools in the first place?
The reality is if you go back to British intervention in Afghanistan when they realised they could never beat the British, but they could fight a guerrilla war using Jihad. Jihad then spread as a form of fighting imperialism and continues today much stronger.
Countries that have to fight for themselves often have stronger systems in place.Those that have something forced upon them will hate their system. Like Iraq with it's American supported government that clearly isn't doing a good job.
If you think it's about liberals preventing these people from being capitalist, you've wrong.