Research
“More than 55 percent of all attacks took place in five countries (Iraq, Afghanistan, Pakistan, India, and Nigeria), and 74 percent of all deaths due to terrorist attacks took place in five countries (Iraq, Afghanistan, Pakistan, Nigeria, and Syria).”
(Please note that two of the nations on this list have been temporarily restricted due to Trump’s executive order: Iraq and Syria.)
“The Islamic State of Iraq and the Levant (ISIL/ISIS) was responsible for 31 percent fewer terrorist attacks in Iraq, the number of attacks carried out by ISIL in Syria increased by 39 percent.
-- The geographic reach of attacks by ISIL and its affiliates expanded as several existing terrorist groups pledged allegiance to ISIL. In addition to Boko Haram in West Africa, the most active of these ISIL branches were located in Afghanistan/Pakistan, Egypt, Libya, and Yemen.”
-Please note that some of these countries include Libya, Yemen, Syria and Iraq (all restricted temporarily)-
http://www.cnsnews.com/news/article/susan-jones/11774-number-terror-attacks-worldwide-dropped-13-2015
Review of this relevant source evidence: Many of the suspects on this list come from Pakistan and Nigeria, but some also come from Iraq.
https://en.wikipedia.org/wiki/Terrorism_in_the_United_States#Islamic_extremism and https://en.wikipedia.org/wiki/List_of_unsuccessful_terrorist_plots_in_the_United_States_post-9/11
This document reviews 60 Terrorist Plots since 9/11. Published in 2013. Interesting cases include: Lackawanna Six (2002), Nuradin M. Abdi (2003), Mohammed Reza Taheri-azar (2006), Air Cargo Bomb Plot (2010), Mohamad Osman Mohamud (2010), Iranian Terror Plot (2011), AQAP Plane Bomb Plot (2012), Chiheb Esseghaier and Raed Jaser (2013).
These foiled plots include plots supported or directed or having involvement with temporarily restricted nations.
http://www.heritage.org/research/reports/2013/07/60-terrorist-plots-since-911-continued-lessons-in-domestic-counterterrorism and
http://dailysignal.com/2015/09/10/a-timeline-of-73-islamist-terror-plots-since-911/
This is a list of individuals in the United States who have left to join Islamic terrorist organizations.
http://www.nbcnews.com/storyline/isis-uncovered/americans-15-who-left-united-states-join-isis-n573611
Additional information of individuals who have left to join ISIS. Some are from temporarily restricted nations or connected to traveling to those nations.
https://www.washingtonpost.com/graphics/national/isis-suspects/
This link includes information about Syrian Refugees and how some have turned to terror after getting a refugee status: http://www.dailymail.co.uk/news/article-3322649/The-enemy-Nearly-SEVENTY-arrested-America-ISIS-plots-include-refugees-given-safe-haven-turned-terror.html
“America over ISIS plots in the last 18 months - including refugees who had been given safe haven but 'turned to terror'
• Federal and local law enforcement agencies have made dozens of arrests of men and women suspected of ISIS involvement
• Analysis shows that they include refugees who entered the United States as refugees”
Additional evidence: https://www.nytimes.com/2015/04/21/us/6-somali-americans-arrested-in-isis-recruiting-case.html
There are countless more articles like these that suggest foiled terror attacks within the United States. Some of which are connected to the temporarily restricted nations from Trump’s executive orders.
This list does not even include really examples of terror in those countries of in Europe.