If he keeps the Muslims out of America there will just be more coming here Johnny, I don't think you've thought this through. There isn't much to debate about Trump really, when you have both major political parties turning on him, it seems a pretty cut and dried argument. He's a maniac.
However, I do find him exceedingly entertaining and I selfishly hope he stays in the presidential race just to see what happens. He would be massacred by the democratic vote if he were to win the nomination.
What does seem curious is that no media outlet has explained clearly what the consequences would be of a blanket ban such as this, even for a short period of time. In turn, because no one does this, you see stories about people (frequently poorly educated white males) who believe it's a realistic, workable proposal and consider Trump to be a genius.
It is likely that countries around the world with a high proportion of Muslims would retaliate by banning US citizens, which would then affect the ability of US corporations to conduct business in these countries. Indeed it may well make it impossible for them. There are a lot more global companies that are American than from the likes of Malaysia, Indonesia, Qatar or Egypt., but for every GE, Boeing, WalMart, Caterpillar, Microsoft, Citigroup there is usually a viable European or Asian alternative. Even if the ban were short-lived, the anger and resentment towards America and Americans more widely would be more lasting.
Meanwhile US universities would be affected by tens of thousands of students not being able to start or continue their courses, with less travel US airlines would need to cut back and with the likely loss or foreign orders, many American companies would need to lay people off.
The ability of key international institutions to continue business as usual - including the UN in New York, and the World Bank and IFC in Washington - would certainly be affected and even if exemptions were made for diplomats and their families, it is likely that it would not be considered an attractive proposition. It would seem likely that long-term investment decisions by these supranational bodies would favour cities like Geneva, Paris, KL and Singapore instead.
Then there are the effects on consumer brands: would 1.5 billion Muslims feel comfortable buying Disney products, Coca Cola, Kraft, Apple, Ford, GM products? If you have been to the Middle East, you will know that many of these brands have been remarkably resilient, but a travel ban starts to affect individuals: it's not a campaign against a terrorist group but a campaign against "me, my family and people like me". That's when ordinary people start to take personal action.
Increased unemployment, scaled back corporations, possible exodus of recently arrived Muslim families (so possibly increasing the unemployment by virtue of the multiplier effect), reduced opportunities for businesses, reduced travel possibilities, alienation abroad, possible loss of international bodies from US, less US participation in international initiatives......
...and all because both Donald Trump and many blue-collar Americans don't understand that Muslim involvement in mass shootings in the US, on the map below, are the red dots, not the blue ones.
Trump is willing to compromise the economic and social well-being of the USA for years to secure the vote of Billy-Jessie, the tow-truck man from Idaho.