Fact or opinion? The passage of the stamp act was a terrible blunder by the british parliament?

You are talking about politics, where anything can be true if you keep saying it and nothing is true if you can't be forced to admit it. In politics EVERYTHING is an opinion. Politicians firmly believe that even the law of gravity exists only if the supreme official wishes it to be so. In the eyes of the British (which is spelled with a capital letter) parliament, the rebellion was a terrible blunder by the colonists. They called it "the Presbyterian Rebellion" and placed the blame squarely on John Calvin, even though he had been dead for two centuries.