What´is the international politics

I understand that some of you guys are confused by what is  going on in the Middle East?  Let me explain.We support the Iraqi government in the fight  against ISIS. We don’t like ISIS, but ISIS is supported by Saudi Arabia  who we do like. We don’t like Assad in Syria. We support the fight against him,  but ISIS is also fighting against him. We don’t like Iran, but Iran supports the Iraqi government in its fight against ISIS. So some of our friends support our enemies, some enemies are now our friends,and some of our enemies are fighting against our other enemies, who we want to lose, but we don’t want our enemies who are fighting our enemies to win. If the people we want to defeat are defeated, they could be  replaced by people we like even less. And all this was started by us invading a country to drive out  terrorists who were not actually there until we went in, to drive them out. It's quite simple, really. Do you understand now? It is politics