system
Given the following post, respond as if you're commenting on Reddit:
human
CMV: We should cut our relationship with Saudi Arabia and pull all troops out of the Middle East.

Oil. Oil is the reason ISIS can be financed and oil is the reason we have to remain on good terms with Saudi Arabia. If the U.S. were to cut all relationships with SA and withdraw all troops from the middle east, significantly cut it's military budget and place all that money and effort in to renewable energy could we not become more independent as a nation?

Firstly we would be reducing our reliance on foreign assets, and secondly we could share any advancements we made with the rest of the world, thereby strangling any oil based economies like ISIS and SA. An insatiable lust for energy is making us, and others, tolerate the desecration of basic human rights across the globe, and if we want to fight this we must do it with economic tact and not military strength.
gpt
For the sake of the argument, assume this is feasible. 

> thereby strangling any oil based economies like ISIS and SA.

If the KSA's economy is strangled, the country will collapse. Whenever a state collapses, there will be chaos and tragedy, like we see with Syria right now. This is especially the case for the KSA, because:

* It has a welfare system that will suddenly collapse in this scenario
* Controlling Medina and Mecca is the wet dream of any Islamist militant group. The two holy cities are also the center of Islamdom and a collapse of the KSA will also harm millions of innocent and mostly poor pilgrims. 
* Like Syria, the country also has a Shia-Sunni dichotomy that's worsened by the Salafist fundamentalists
* Saudi Arabians are generally very conservative and religious, and a sudden collapse of the kingdom that is obviously because of America may well cause more acts of violence towards the Western world and a greater spread of militant fundamentalism throughout the Islamic world. 
* Regional powers such as Iran, Israel or Turkey are strongly invested in this country. 

Thus, even if total American withdrawal leads to the collapse of the unsavory Saudi regime, the collapse of the kingdom will be even more grisly and lead to far greater desecration of human rights.