"There are two views regarding how Syria will respond if Israel attacks Iran, either by itself or together with the U.S. One [view is that] the Syrian government, in all its cleverness, will not lift a finger, preferring to take its time... The second is that Syria will join in the war and fire tens of thousands of missiles – including some with chemical and biological warheads – at Israeli cities and targets, under [its] current binding agreement [with Iran]...

"The second possibility is the more likely of the two. Perhaps the next war, if it breaks out... will change the face of the region from top to bottom, just as World War II did: Regimes will be wiped off the map, and others will take their place. Perhaps Israel will be impacted most of all, and it is not inconceivable that its fate [as an occupier] will be similar to that of the German Nazi regime...

http://www.memri.org/report/en/0/0/0/0/0/0/3987.htm

Our Arab friend forgets but a few details.

In World War II it was the Arabs' ally, Nazi Germany, that lost. It was the big occupier of Europe, not some small state, that lost the war and its empire.

Why would the Arabs think that after a big war that changes the entire Middle-East they would still rule North-Africa and the entire Middle-East?

I think it is more likely that a big war in the Middle-East will destroy the Arab empire from Morocco to Iraq and the Arabs will lose North-Africa, Sudan, Kurdistan, Assyria, and Lebanon; just like their German allies in World War II lost Europe.