The reason oil prices have come down is because OPEC has cut prices arbitrarily. They were artificially high to begin with. On average it costs an OPEC nation ~$30 to produce a barrel of crude. They're still making a shitload of profit.
Yes OPEC makes profit. But many countries depend on that profit. They organize education, .... with that money.
Reason why oil price come down is not opec is companies in USA using that new technology to get oil. But that is expensive method and at some point those companies will close. Opec is smart and will not try to maintain price artificially high. Lets teh market do and take off those that produce with to big costs.
Those companies took loans in banks. And when they will bankrupt and will not be able to pay off debts. Guess who will pay this?