It seems a lot of Christians do take offense to the statement, yes. But it’s just not controversial in philosophical circles, even traditional Catholic ones. When philosophers of religion, whether Thomists and Augustinians or atheists and pantheists, discuss the Problem of Evil, they all understand and acknowledge that it applies to the God of Judaism, Christianity, and Islam: the Abrahamic God, Who is omnipotent, omniscient, and omnibenevolent.
Where things differ, of course, generally, is when you get into sacred (revealed) theology, with the Trinity and such. But again, Jews, Christians, and Muslims have a great deal in common regarding the conclusions of natural theology – doctrines regarding What/Who God Is that are reachable by human reason.
I don’t think I’m exaggerating by saying that the vast bulk of Book One (“God”) of Aquinas’ Summa contra Gentiles is perfectly compatible with what traditional Muslim theologians believe about God. They could adopt Aquinas’ philosophy here and be orthodox Muslims.