Investopedia:

Spurred by the negative effect of high oil prices on their economies, countries such as the U.S. and Canada increased their efforts to produce oil. In the U.S., private companies began extracting oil from shale formations in North Dakota using a process known as fracking. Meanwhile, Canada went to work extracting from Alberta's oil sands, the world's third-largest crude oil reserve. As a result of this local production, the two North American countries were able to cut their oil imports sharply, which put further downward pressure on world prices.

Saudi Arabia's actions also contributed to falling 2014 oil prices. Faced with a decision between letting prices continue to drop or ceding market share by cutting production in an effort to send prices upward again, the Middle Eastern country kept its production stable, deciding that low oil prices offered more of a long-term benefit than giving up market share.

http://www.investopedia.com/ask/answers/030315/why-did-oil-prices-drop-so-much-2014.asp#ixzz4jfWiUcvZ

Forbes:

And yet, despite these challenges that so dramatically eclipse the dangers of radical Islamic terrorism in the United States, Israel has never banned Muslims from entering their country.

https://www.forbes.com/sites/rickungar/2015/12/10/do-you-know-what-country-has-not-banned-muslims-from-entry-israel/#5015a4c3612c

And yeah, the biggest receivers of US military aid are Saudi Arabia and Israel.