Earlier quoted context omitted.
And if you had read the text, which you clearly haven't, you'll see that there have been issues with the visa process, and the new administration wants to review it. https://www.nytimes.com/2017/01/27/us/politics/refugee-musli... Go read it, now.
Reviewing the visa process is fine However the lack of concern with Saudi Arabian citizens just shows how this is nothing but smoke and mirrors
The kingdom’s conflict has continued in more recent years. In December, the Saudi defense minister established a coalition of 39 Muslim-majority countries with a specific mandate to combat al Qaeda, the Islamic State, and the Shiite terror group Hezbollah. Saudi counterterrorism security forces are on the front lines every day taking the fight to al Qaeda; hundreds of Saudi security officers have been killed in the line of duty at home, fighting Islamist militants. As recently as April 5, militants attacked and killed a senior Saudi security officer outside Riyadh.
U.S. intelligence and security officials have been particularly effusive in describing the important role Saudi Arabia has played in cutting off the sophisticated global network of illicit finance used by terrorists. According to the State Department, “Al Qaeda in the Arabian Peninsula’s lack of success in Saudi Arabia can be attributed to the Saudi government’s continued domestic and bilateral efforts to … counter terrorism and violent extremist ideologies.”
The truth is plain: Americans are safer today because the kingdom has foiled numerous al Qaeda terrorist plots targeting the U.S. homeland. Adam J. Szubin, Treasury undersecretary for terrorism and financial intelligence, recently praised the kingdom’s aggressive stance against terrorism as reflecting “the strength of U.S. and Saudi cooperation on countering the financing of terrorism.”"
http://foreignpolicy.com/2016/04/20/saudi-arabia-is-a-great-...
Our relationship and the dynamics of Middle Eastern politics are extraordinarily complicated. To simply boil down our relationship to the Saudis as "majority of 9/11 hijackers came from there, therefore terrorist state" is reductionist. The House of Saud is not a monolithic structure and there are a lot of differing opinions on how to take the country forward. Deeper reading into the nature of Middle Eastern politics and our relationships to people in the region should quickly reveal that nothing is simple.
Pakistan is another good example. Supporting them is necessary for a variety of defense/political needs. Logistics with Afghanistan, pressure to be placed against the mujaheddin that use Pakistani tribes as a base of support, counter balance against China, etc. Yes Pakistan has a murky relationship with terrorism due to their use against India in proxy warfare. That doesn't change the reality that opting to alienate the Pakistanis just makes life worse for us.
These are not one subject issues. Like anything else involving millions of people, our reasons for taking action are multi level and multi issue. It is an immense disservice to career diplomats and policymakers to reduce concerns down to a single thing. There are no clean answers.