Saudi Arabia has supported Isis - if it has dried up recently they have still supplied arms to Isis from those bought from the U.S. and Britain.
The reason given by Saudi Arabia for no longer supporting Isis is not because they no longer oppose their aims but "they believe Isis will target them next"
If that threat to their sovereignty lessens they will return support their aims and Britain will continue to sell them arms..   
The situation has not changed in any way with Turkey, Qatar and Kuwait - all supporting Isis - all arms customers of Britain and the U.S.
We are back to your supporting arms sales to terrorist states - leopards - spots and all that.
Jim Carroll