Short answer is yes, long answer is maybe. If more money is need it can be just printed ( Uncle Sam's assets and values can't really be measured and most of America's debt is infact owned by the American people, Social Security and whatnot) of course it means higher inflation but since the US dollar is a World standard, do you think they really care? They are after the oil and all this is just to ensure that they get it. Petroleum is integrated into every aspect of our society, not just gas (simple things such as plastic, shampoo and everything you can possibly think of is basically connected to oil). Yes there is a ton of money that is flowing too damn loosely but who really is counting, who can be held accountable, who is the one going to enforce it. Answer to all those questions is the Government.
The Arab countries are not just one big group of people that just occupy different countries. They all have their own cultures, pride and customs (pride is a big thing to them, it's a very ignorant comment I just made since I don't know all the different Countries personally but I believe it is accurate). While they might be willing to help eachother out once in a while, that doesn't mean they are united.
As for the reasons why that "Embassy" is there for the better or worse, I would venture to say it's a means to an end. It's there to have a foot hold in enemy territory, it's there for intelligence purposes (I use that term very loosely), it's there for meet and greets, arms deals, shaddy deals, greed and everything else it can be used for.