It is a Muslim ban. It is not yet the total ban Trump promised, but it's a down payment on that promise. Giuliani brags about his role in crafting a Muslim ban that might not look like one. It also differs substantially, essentially, from President Obama's policies:
" ... it may seem like a minor point that President Donald Trump and his advisors, in seeking to justify and normalize the executive order, have made a series of false or misleading claims about steps taken five years earlier by the Barack Obama administration."
From an article published on January 30, 2017 on the Foreign Policy website. The article specifies the distortions and falsehoods offered up by Trump and his defenders in defense of their Muslim ban. The article is here: http://foreignpolicy.com/2017/01/30/sorry-mr-president-the-obama-administration-did-nothing-similar-to-your-immigration-ban/
Trump lied his way into the presidency. Obviously he thinks he can lie his way through the presidency, too. We'll see.