Arguably, I'll give you that the Americans fucked up Iraq royally, but tell me:
1. How are the Americans responsible for the mess in Syria?
2. How are the Americans responsible for Islamo Fascism that rules every middle eastern country and all the "stans" and a good chunk of Africa?
The US has been plotting to remove the Assad regime in Syria through it's proxy Saudi Arabia. Unless you've been in cave for the last 4 years, it was the US that funded the so-called moderate rebels in Syria, who have mostly since defected to Al-Qaida/ISIS/IS. After the debacle in Libya, the CIA transferred weapons from Libya's huge stores of weapons, along with Libyan religious nut-jobs to Syria, and through a complicit Turkey, who have an agenda of their own: the re-establishment of the Province of Damascus that was once part of the Ottoman Empire.
It was the Saudis that pumped hundreds of millions of dollars into what became ISIS, in order that they go to from Iraq to Syria and overthrow Assad, and break the Shiite crescent in the Middle-East from Iran, now-Shiite Iraq, Syria and Lebanon/Hezbollah (shortly after ISIS started rolling in Syria with their shiny new Toyota pickups and SUV's, they turned against the Saudis, and Saudi Arabia is next to be annexed to the Kaliphate, minus the Saudi royals). The Saudi national religion, Wahabism/Salafism, regards Shiites as apostates who's only purpose is the get their heads chopped off. The US was complicit in the establishment of ISIS, since it could not have not noticed the huge transfers of money from Saudi Arabia to ISIS, given that they have the largest, most sophisticated and most expensive intelligence gathering apparatus in the world, and that the Saudis are their close allies. How naïve to expect that just a bombing campaign could stop ISIS in a region the size of the UK; in fact, it's just window dressing. In reality, ISIS is doing the US and Saudi Arabia's bidding for them, or being useful idiots.
And is your memory so short to not remember that it was US led NATO that launched an unprovoked bombing campaign against Libya and destroying that state, that had the highest per capita income in Africa, and transformed into a failed state, with 3 main factions fighting it out for control, one of which is ISIS?
The result is millions of people who are fleeing the results of US spreading freedom and democracy through the force of weapons. I'm frankly surprized that the blowback, in the form of millions of people fleeing war is affecting Europe but not the US, and nobody seems to be paying any attention to that fact. The EU should mount a full scale ground war and kick ISIS out of Syria and Iraq, and tell the Americans to fuck off and stop destabilizing the world.
And as a footnote, as the moderate rebel experiment in Syria has failed utterly, the US have been looking for other rebels to co-opt for their purposes. The heart-eating Jabhat Al-Nusra Islamic nut-jobs are now being converted into less-extreme rebels, because they are fighting against the Assad regime. Israel was caught giving them refuge in the Israeli held Golan Heights, and Israel has been giving them satellite intelligence if their fight with Assad.
Every single American adventure in democracy building through bombing had ended in failure because they figured that market capitalism would miraculously generate a pliant US friendly democracy in the resulting power vacuum.... anything but. And they have been repeating that strategy over and over for the last century. The US has been responsible for overthrowing and otherwise destabilizing the governments of at least 40 countries since WW2. And how many countries has China invaded? Maybe 1: Vietnam. The US destroyed Viet Nam, and killed a couple million of their people. But that doesn't seem to count.