This EO has absolutely forethought given to it:

1. When, exactly, was it meant to be in effect?
2. How do you handle the people on planes at the moment of signing?
3. It wasn't run by Homeland Security at all before signing so they had no idea how, exactly to implement it.
4. All Muslim domestic terrorist attacks have been perpetrated by American citizens or legal immigrants.
5. The countries of origin of our foreign terrorist attackers: Saudi Arabia, Egypt, Lebanon, UAE - are NOT included in the list of countries affected.

I want a Trump supporter to explain how this EO was a good idea given the above.

This will make us safer how, exactly?  What we have is a simpleton President firing off EO's as fast as he can think of them WITHOUT ANY idea of their ramifications.  This is not how one governs the most influential nation on earth.

Trump is on a one-way street to impeachment as he tests how far he can stretch executive powers into a fascist direction.