User blog comment:Aghostintheboat/The Official Roleplay Room/@comment-10905876-20150118031753/@comment-11135771-20150118050700

Marc, it's not based on OOC knowledge. The IRF knows that Israel has a large flying ship fleet which tends to be able to respond very quickly. They don't know for sure that any ships will be ready to fly, but they don't want to take the risk. The same would probably also be true for attacking any other faction which had a sizeable aerospace fleet.