Unfortunately I believe you've linked to someone who has a very strong opinion on the topic but does not understand this issue from a more macro perspective. He is totally right about how the term "Muslim Ban" is slightly misleading but it does get the core point of the inherent discrimination behind the order across.

Within his first week of office, Trump has signed over 12 executive orders; the issue at hand is a flagrant violation of the American peoples trust in their president. Trump is quite clearly taking this strategy of executive orders in order to project an image of the "get shit done" type of businessmen platform which he ran on. Most people have yet to look into the constraints placed upon executive orders. They really just make for good headlines (especially with the dominant 24/hour news cycle). The issue at hand is the overall incompetence of Donald Trump.