God loves the descendents of Ishmael as much as He loves us, and salvation is available to them as well as anyone else, but they are uniquely enslaved to Satan in a way that others aren't and it is extremely hard for them to be rescued from that oppression.
However, the fact remains that the promises God made to Abraham were to be fulfilled through Isaac, not Ishmael. And if Abraham and Sarah had simply trusted God and not disobeyed Him, so much anguish and needless death through the last four thousand years could have been avoided.
That is why we HAVE TO pray for their conversion to Jesus Christ.