ISIS (or ISIL or DAESH), is not the only Islamic terrorist group, but rather there are many others (Al-Qaeda, Boko Haram, Hamas, Hezbollah, the Taliban, Al-Shabaab) because the Quran is a violent book. http://www.ucg.org/the-good-news/does-the-koran-promote-peace-and-cooperation
However, in regards to immigration in general, I wanted to point out that the first generation of immigrants tends to vote over 80% for the Democratic party according to Ann Coulter's book, Adios America. The Democratic party is the party which has advanced both same sex "marriage" and abortion over the past seven or more years. In order to stop these latter two issues from advancing even further, the first thing to do is to stop the flowing in of people who are going to vote for candidates who are advancing these two issues and who also may be able to lock them in place by stacking the Supreme Court with justices who will defend these policies.