So, just what did Trump's note in the Western Wall say? Per BBC News

This BBC article http://www.bbc.co.uk/news/world-us-canada-40003636 pokes fun at President Donald Trump but it also tangentially has a laugh at the expense of the holiest site remaining available for Jews. The holiest site is actually buried underneath a mosque and courtyard just beyond the Western Wall but don't expect the BBC to explain how that could be the case.