I'm with you on ISIS and their destruction.  I had to make a couple of edits so I didn't credit the publication.  It was all factually correct.  I also agree with you on using the WaPo as a news source.   
https://www.washingtonpost.com/news/post-politics/wp/2017/05/21/president-trumps-full-speech-from-saudi-arabia-on-global-terrorism/?utm_term=.1097c790a1ef

As far as Trump's visit being a first, it was the first time a newly elected American President visited a Muslim country before any other.  It was very important to the Muslim World.