Of course the people are the militia. But the right MUST apply to the people otherwise only “the militia” is allowed to have weapons. This is what leftists have been trying to push for decades by saying the National Guard represents the militia so only they should be allowed to own arms. The 2A is a right of the people. The People is the subject of the right provided in the amendment, not the militia.
Yes, and in fact, the entire "Bill of Rights."