In desert storm, sadaam committed an act of agression that by implication threatened them. It was in their self interest to join in the fight to remove sadaam from kuwait.
but it took a whole lot of diplomacy to convince the Saudi's and other Arab countries to allow US troops on their soil... it violated some basic principals of their culture and was a major concern.
and I guess you then agree that the neighboring countries didn't believe saddam was a not a threat to them.
Sara
"I never give them hell. I just tell the truth and they think it's hell." - Harry Truman