Whether Sadiq Khan said "terrorism should be an accepted part of living in a big city" or said "the threat of terrorism should be an accepted part of living in a big city," the message is the SAME.

Khan is indisputably saying that terrorism is a part of life in cities now; so get used to it.  Whether "the threat" part is in there or not, the view is the same.

And while the timing was terrible (as London deals with an Islamist terrorist attack,) that view is exactly what Trump called out as inappropriate, and rightly so.  

And it's especially inappropriate considering that 99% of the threat of terrorism is from Muslim extremists and the Mayor is Muslim.  Imagine a Christian mayor in a majority-Muslim Southeast Asian country that's reeling from Christian extremist attacks saying "terrorism - just deal with it."

Terrorism should NEVER be "part and parcel of living in a big city."  

#PrayForLondon indeed.