It would be inhumane to send them to a Mexican prison. (/sarc)
21 Feb: NRO: Saudi Arabia’s ruthless migrant policy
Saudi Arabia has recently expelled almost 40,000 Pakistanis, to add to the 243,000 already expelled between 2012 and 2015...
Furthermore, a friend who has lived in Saudi Arabia tells me that migrants, and especially Syrians, are considered trouble-makers not to be admitted into the country under any circumstance...
http://www.nationalreview.com/corner/445111/saudi-arabia-pakistan-migrant-deportations