That's the problem. The Americans didn't like the way that the British government was treating its subjects in North America. As far as they were concerned, they were entitled to the same rights as people living in Britain, with their own representation.
Also, a lot of those grievances listed in the Declaration were directly caused by the British government: quartering soldiers, taxing without consent, suspending the legislatures of the states, not granting Americans a trial by jury, not giving the Americans any say in their own defense, and generally not giving them the autonomy that they desired. The only grievance that I think has nothing to do with the British government is the last one on the list, which accuses the King of "exciting"* attacks by Indians. That comes across as a deliberate bit of misinformation by the author, who was one of the most brilliant men of his generation and obviously knew better. But the rest of the grievances are legitimate, and were about the actions of the British King and of Parliament.
On the whole the American Colonists had very legitimate grievances (in most cases) regarding Great Britain's taxation policies, legal issues, land ownership, and economic tariffs. However, it is also important to remember that the British had a very difficult time enforcing many of the ones which would have actually economically damaged the Colonies (they had about as much power to stop all the smuggling as the French would have to walk across the Channel at the time) and were on the whole, not incredibly decisive in enforcing really any of them.
Taxation was the most egregious since it was enforceable by the British pretty easily. With all the grievances though I would say there really wasn't a need to incite armed insurrection at first.
I disagree. The Americans wanted to the rights that they felt they deserved as British subjects. When the British refused to grant them those rights, independence was a reasonable course of action. And since the British weren't going to let them become independent without a fight...
Well I quibble and say the North government (and probably George III in general) wouldn't have allowed any compromise, which means that under those circumstances a confrontation of some sort was pretty much inevitable.
The Colonists weren't friendless in Parliament, and without the clique of powerful men in the North government at this time it may* have been possible to reach a sort of accommodation. In fact the Colonists evidently thought this too in the early stages, and lacking the men in power in Britain who were in power OTL they could have succeeded in working the issue out peacefully.
*May really relates to how much power groups like The Sons of Liberty might have amassed in the short term, or if the British have taken punitive measures during this time.
Come on, don't answer a strawman with a strawman. I've never met a single American who claims that the Founders were oppressed compared to the Indians**.
*18th century way of saying "inciting"?
**Native Americans or literal Indians
Too many Americans tend to shout "OPPRESSION" at the top of their lungs as though the British were murdering Colonists in the streets at every opportunity. Rather than having economic and political disagreements with the British Parliament.
The Colonists had it good, and didn't exactly suffer under British rule. The argument that they were being 'oppressed' is just absurd.
*I think that's probably it.
** Literal Indians, the term can get a mite fuzzy when being thrown around during this period.