The similarities that exist in these countries are very similar to those of Nazi Germany:
Murderous tyrants and fanatic supporters: Hitler slaughtered millions in his day. Evil men such as Ahmedinejad still hang gays in Iran, and then boast in America about there being no gays in Iran! Another example is the recent lashing of a Saudi women for being in a car with men not related to her- and then raping her! Or the "death to Denmark, death to America" placards and riots that ensued after a brave Dane dared to publish portrays of Mohammed in a magazine. 9/11, and the Madrid and later London bombings. It all hails back to an era when Nazi supports burnt down the shops, homes and livelihoods of Jews, Poles, or anyone Hilter didn't like. And the constant excuses for carrying out murderous actions.
Evil philosophies: Islam isn't a "religion of peace" (this will be discussed later). Fascism was, and continues to be, an extreme form of statism, in which all power is given to a select few in the state. It is built on Nietzsche's concept of the superman. The Islamofascist philosophy of radical Islamists is merely an Islamic twist on normal fascism. The same goes with Ahmedinejad's theocracy in Iran, which is a cross between middle ages theocracy and modern Islamofascism. As seen in the example given above, Saudi Arabia is the same.
Islam is a religion. As has been said on SOLO (and this goes for all religions), it is a "stinking superstition". Although the adjective "stinking" can certainly be used to mean events happening under Islam's name as we speak, the "superstition" part applies to all religions. Because religion - belief in what may be true to guide us in life - is in direct contrast to knowing what is true, to guide our life on this Earth. Islam, in its current post-enlightened state (the Islamic "enlightenment" of the Middle Ages was achieved by men acting in their self-interest to advance their life on Earth) resembles Christianity during the Middle Ages. Or the worship of Hitler during WWII.
Pragmatic Supporters: The great majority of Muslims, both in the West and in the Middle East, are good people. The problem with these people - and admittedly there are some people who do speak out against the atrocities committed in the name of their religion - are pragmatists. They live their lives, follow their religion, and don't think twice about Islamofascism. The same was true with the Germans in under Hitler. Although it's hard for Muslims to speak out against a regime that terrorizes them, and the same was true with the Germans, what annoys me is the lack of speaking out by free Muslims, in the West. Instead, they're too preoccupied with yelling about Mohammed cartoons, or refuting claims like mine that Islam can lead (and often will lead) to evil regimes and tyrants.
It's this pragmatism that refutes the claim that Islam is a religion of peace. If that were so, there would've been demonstrations all over the world in response to 9/11, and Ahmedinejad would've been long overthrown. It wasn't until after WWII that the Germans saw Hitler's evil. Under a true "religion of peace", that wouldn't be the case just over the horizon.
Western Appeasement: I'm not one of those people who believes in going and blowing up Iran now. But then again, Hitler hadn't invaded anyone until what, 1937? Just two years before WWII started.
However, what was disgusting during WWII was the West's complete inability to do anything. Even when he started invading, no one was smart enough to stand up to his reign of terror until Churchill came around. America didn't enter the war until it got bombed itself. This appeasement allowed Hitler to take half of Europe in weeks. There should be no such appeasement toward today's Islamofascist regimes, and if they do attempt to invade, the West should be on it in minutes.
And the other part of Western appeasement is the PC attitude towards it all. The West should have no fear in denouncing Islam and Islamic regimes, for what they have created where they have been tried. And if anyone's offended... too bad! Free speech includes the right to be offended!
It's these four things that have contributed to the barbarism committed under Islam in the Middle East today. And unless these issues are dealt with in a consistent, objective manner, things will only get worse.