This point about banning countries he doesn’t have business dealings in is probably a bit coincidental, since his Executive order used an Obama-era list to determine the countries to ban. This list merely compiled countries with significant terrorist activity, and was forced past Obama’s desk on an omnibus spending bill by congress.
http://www.snopes.com/trump-immigration-order-obama/The thing with Executive Orders is that they must reference specific legislation, since it is not (supposedly) in the Executive’s power to legislate. Now I would bet that if Trump didn’t have business in Saudi Arabia or the UAE, he would have found some legislation which included those countries. As it is, we can only speculate as to the why of all this.
One thing I have noticed that nobody here seems to be addressing is the understanding that a large number of these refugees that claim a nation as their home aren’t even native to that country. They were in those countries because they may have been fleeing somewhere else. The FBI did address this particular issue but it seems it’s been glossed over. They alone still have 1,000 vetting investigations on the books as of today.
It was also noted that countries people are complaining about that did not make the list may actually end up on the list once the details get sorted. Without any facts except for embellished headlines that point fingers and call names I don’t see how any of us could even say anything else for certain.