You have to take this in sections of the world. I’ll do my best to summarize, but it’s a 10 page paper I’m trying to fit into this as an answer. The Western Block of Europe will turn to Russia to back a no refugee policy. This is potentially dangerous as it could indicate a return to a Soviet controlled block. At the very least is strengthens Russia’s dominance in that region once again, and the progress gained in this region of the world since the fall of Western Europe will begin to erode to the point of possibly being extinguished. Eastern Europe as well or what was previously NATO European countries are facing a potential crisis. They have maximized any capacity to take on refugees, and if another crisis unfolds sometime soon they could have a very volatile situation on their hands. It is already at a boiling point, and terror related attacks are increasing in volume. If a country like Turkey implodes, then all hell will break loose in Europe. It almost did with the last coup attempt. Turkey will see another coup attempt if they stay the course they are on now. Africa will continue to turn Islamic and you will see the spread of Islam and support for Sharia law as far south as South Africa, were you could start to see the beginnings of civil conflict between what is left of western civilization there and Islamic extremists. Asia will see a strengthening of Islamic ties, and the country to keep an eye on there would be the Philippines. China and Japan can keep Islam at bay as they are not handicapped by multiculturalism. Russian will continue to be attacked especially on its Southern boarders, and will be in a constant battle with extremists in that region. I haven’t touched the Americas yet, but Canada is rethinking its open border strategy right now. They have had their own issues similar to Europe 5 years ago. If they maintain their course they will start to look like England today in five years, Australia the same. So the US is the wild card. The election of Trump gives the US a chance to avert a tipping of the scales, but the damage may have already been done. Another influx of refugees will only give confidence to extremists that are already here, and are prepared to make attacks. If refugees keep coming in then attacks will increase here as well. If the spigot is turned off those that are here already will bide their time, and explore a longer plan. After all in 4 to eight years the spigot will get turned on again. The last administration saw a dramatic increase in attacks on the homeland. Though smaller in scale terrorists were able to carry out successful attacks in the United States proving that they can be accomplished. I Expect a widening of terroristic attacks in the US as the targets get more selective. Soft targets will continue to be exploited.
My nightmare is that the ultimate soft targets will get hit. Our elementary schools are extremely vulnerable.
I tried to summarize my current thoughts. Keep in mind this is a quick summary. My thoughts on this are always changing based on new open source information. Thanks for the thoughtful question, and I hope you enjoyed my answer to it. See my other post in this thread as to what I think needs to happen to change the current landscape. Overall summary is the world is in for an attempt to increase the intensity of the terroristic attacks. It will get worse before it gets better.