I believe it. It makes perfect sense. In the long run, war equals money for the upper powers in America. Besides, it’s not like there was a real chance of invasion.
Let me put it this way.
In World War One, probably the main contributing factor as to why the USA joined was because of the sinking of the British ship, RMS Lusitania. It had American passengers on board. In the New York Times, in the days leading up to the ship leaving, the Germans themselves had put ads in the paper stating the ship would be attacked and they advised Americans not to board. And yet the government allowed American people (and the British for that matter) to get on the boat, and leave on schedule knowing very well the chances of being attacked were almost 100%.
I didn’t learn that from a conspiracy site, I got it from my history teacher.
This would be the exact same story if you just replaced a few of the words for World War Two. It really isn’t that far fetched.