[BroJoeK]

DiogenesLamp: "No more illegitimate than the claim by the Colonists that the British were "oppressing" them.
The Canadians were under the exact same laws, but they didn't feel oppressed.
The British Loyalists in the US also didn't feel oppressed."

But our Founders certainly did feel oppressed, for dozens of factual reasons listed in their Declaration.
Among those reasons, the Brits had already started, declared & waged war against them, and would hang them if captured.
Those are far from trivial or "at pleasure" reasons for "secession", they amounted to clear & present necessity and nothing remotely resembling those conditions in late 1860-'61.

[DiogenesLamp]

But our Founders certainly did feel oppressed, for dozens of factual reasons listed in their Declaration.

Like this one.

He has excited domestic insurrections amongst us...