The Saudis were nice to Trump because he gave them what they wanted. They got state of the art arms, including the THAAD missile defense system for $5 Billion less than offered by Obama through a discount arranged in part by Kushner. Trump went from anti-Muslim to very respectful of Islam. He is taking in more refugees-- from 800 per week to 1,500 per week. And Trump has agreed to increase military support for the Saudi's in their two year old war in Yemen-- the support requested by Prince Mohamed during his visit to the Whitehouse three weeks ago. He has spoken out against Iran. Most of these are things that Trump has come to recently and Trump's far right supporters, like Jack Posobiec Director of Citizens for Trump very angry about the change (he has stopped backing Trump) and like Ann Coulter author of "In Trump We Trust"-- you can find stories on this on far right sites like Infowars. What Trump is doing is good, and it gives the Saudi's what they want and they are nicer to us.