+24 (second amendment interpretation 7)

The first comma seems to show that they were talking about that time and through that imply different world could lead to different results. Another view seems to have went exactly contrary to that purpose by suggesting that the purpose is to separate the part between the first two commas as always true. But if it is the later, why did they use "being" to speak about the status of the existence of the militia in the world instead of directly about the militia itself? 

Notice that the purpose of stating that the necessity of a militia is not dependent on the type or kind of militia can fit as part of the purpose mentioned at the beginning above.