The development of Trump's plan are announced in a speech off following an Orlando Shooting in 2016.
“The immigration laws of the United States give the president powers to suspend entry into the country of any class of persons. Now, any class — it really is determined and to be determined by the president for the interests of the United States. And it’s as he or she deems appropriate.”
— Donald Trump, speech in reaction to Orlando shootings, June 13, 2016 [8]
The claim is that people from these Muslim countries are dangerous and that the United States should not allow these people to immigrate into the country[6]
Following Trump's election, he proceeded to sign Executive Orders (E.O.) that effectively banned people from Muslim majority countries (Libya, Syria, Iran, Somalia, Yemen and Sudan) from entering the United States. The initial E.O. 13769 were signed on 27th January 2017 [1][4]. It was subsequently replaced by a "watered down" version in E.O. 13780.[1][5][6]
A third E.O. were later signed on September 24th 2017 which adds "North Koreans and certain Venezuelan government officials." Since the North Korea only accounts for 61 visas the year prior, out of 75 million total visitors, the overall ban is still targeted at Muslims. "nearly every single person from the Muslim-majority countries is barred from getting a green card, no matter what family, business, or other U.S. connections he or she has. " Many lawsuits followed but ultimately, The Supreme Court on 26th of June 2018 decided to "upholds Trump's Muslim Ban 3.0"[1]
The Executive Orders signed not long after his inauguration shows the world that the United States is not afraid to sanction people based on religion. The act of barring a selection of countries from immigration shows government's disregards to the individuality of the foreign nationals involved. We have absolutely no evidence that those committed terrorism in the United States do so because where they are born. They do it because of their own will.
There are many others residing in the countries whose ability to immigrate to the United States bring many benefits. The effects of such a ban is wide ranging, reaching far beyond just reducing chance of terrorism. Our scholars whose home are now beyond reach? they loses faith in the country they are residing in. Imagine yourself, as a high-skilled immigrants whose families overseas they can never see again; would you really want to go to work tomorrow?
There are many innocent people whose lives can be greatly affected by such a discrimination. As Foobar from StackExchange [3] have said
"Ding ding ding, [...] Immigration control is inherently full of vagary. Any system tight enough to actually stop "the bad guys" will also screw up vast numbers of innocents; any system open enough to allow ordinary people through will never provide full protection."
The argument that Trump was making in the video [7] was that "the currently politically correct" way to do things prevent us from thinking and acting clearly. He proceeds to point out that the killer was born in Afghanistan to an Afghanistan parents. He was not able to explain why Afghanistan itself should be banned, rather, he wanted to banned the whole region that shares a similar Muslim majority population. He claims the region has a proven history of terrorism against the United States, Europe, or its allies until the United States understands the threats. "Many of the principals of radical Islam is incompatible with ... American values". He concludes to say that we should not allow Islamic extremists that suppresses the freedom of values the United States supports.
Near the end of his immigration policy speech [7], he did mention that he was willing and will be requiring the Muslim communities to work with Trump to turn in the bad guys. He claims that the Muslim communities knows who exactly the bad guys are. The United States should always make improvements to the immigration processes and work with other government to reduce threats to the United States. Discriminating nations will only bring humanity apart and could result in even more anger. If we really want to protect our precious individuality and diversity of the United States, the discrimination has to stop.
The actions taken by Trump to ban Muslims takes a reductionist view, claiming not just Muslims, but everyone in those countries to be a danger to the United States. Trump and his supporters have almost certainly never actually lived in those countries. It is likely the collective unconsciousness of the group that drives the quick decision making before analyzing what actually caused previous terrorism.
Trump and his actions are akin to Thanos from the Marvel cinematic universe. Instead of using the resources available to him, a quick irreversible solution are preferred without voicing the opinion of all those who maybe affected by the actions. The recent presidential alert test has been compared to "The Snap" which occurred in Avengers: Infinity War. "The Snap" was deemed responsible for removal of half the population from the "overpopulating" universe. Thanos solution were aimed at bringing joy and richness back to communities; instead it broke apart families, ending the famous action movie in sadness.[10]