INSS: Implications of an Israeli aggression: 'One anticipates the outbreak of World War III, while the other envisions containment & restraint'

... and the INSS, (close ties to the IDF leadership) says; 

"...Overall, there are two opposing assessments of the implications of an Israeli attack. One anticipates the outbreak of World War III, while the other envisions containment and restraint, and presumes that in practice, Iran’s capabilities to ignite the Middle East are limited..."