As to they "wanted to be sure the population could not be disarmed" I do not think they ever gave it a seconds consideration. It wasn't even part of their thinking. Owing a firearm was too important to basic survival.
Hap, I still find myself disagreeing with this thought. It is a convenient way to lay the groundwork for removing a principle right of the Constitution. The problem is it totally ignores the history of the amendment, in fact ALL of the first 10 amendments.
Since you didn't look up the Intolerable Acts (I assume), I'll give you a concise version:
1. Closed the port of Boston, depriving the city its main source of income and sustenance
2. Removed self-government
3. Disallowed groups to gather
4. Forced colonists to quarter soldiers in their homes
In addition:
1. Colonial militias arsenals were to be seized (Lexington and Concord?)
2. Speaking out against the government was punishable by jailing (those jailed might languish for months or years without trial)
3. No representatives of the colonies were allowed in Parliament
4. Search and seizure of private property was commonplace for little or no reason (was intended to stop smuggling, but of course extended way beyond that point)
5. Britain established a state-sponsored monopoly in the form of the East India Tea Company, depriving many colonists of their livelihoods
Now check that list over and tell me the first 10 amendments didn't apply almost directly to each and every point here. Try to tell me again how the 2nd amendment was not written specifically to prevent the public from being disarmed.
What is patently clear is that each and every one of the first 10 amendments was designed to prevent something that had already happened from happening again.