Number one is domination of their own region. For example, Israel was the farthest thing in Saddam's mind when he occupied Kuwait. The ONLY reason he lobbed SCUDs at Israel was to provoke an Israeli response that he could exploit in the greater Arab world.
Saddam's Ba'ath Party is Pan-Arabist. That's NUMERO UNO on their agenda. Israel is way down the list, only as an exploit for cannon fodder.
The Taliban don't care about Israel. They want to rule Afghanistan, free and clear. Same with the radical Islamists that rule Iran.
The U.S. stands in their way, obviously. Look what happened to Saddam's dreams of ruling a Pan-Arabic world when the U.S. got into the game.
You people really DO need to get out more. It would help, for starters, if you'd stop bowing toward the East (and Israel) every time you wake up in the morning. Israel is CHICKEN-FEED in terms of the realpolitik of the Middle East and the Islamic world.