Egypt is at peace with Israel because the U.S. gives it nearly the same weapons so it has deterrence. Iran funds Hamas to keep Israel in check. The U.S., of course, has a long history of funding groups it has no interest in directly, but they serve to keep its "enemies" in check.

The 9/11 bombers were a Saudi Arabia project, not officially, but one of its families (factions) Those factions are everywhere. In short, Arabs, like everyone else, fund groups for different goals than the groups themselves.