All very good reasons why 19th century Americans didn’t trust Britain or the disunionists who wanted to be dependent on the UK.
Not trusting the British is probably a good idea, but so is not trusting anyone else. The people most interested in a people's welfare is that people themselves.
Speaking of disunionists, Massachusetts and Connecticut seriously considered rejoining the United Kingdom during the war of 1812. I guess they were willing to sell everybody else out. Would Britain have been able to retake the other states with the help of these two? They probably would have made a conscious decision not to attempt it.