Whats the point of the 2nd amendment

edit- follow up question

“a well regulated militia”. since the amendment was passed, and since the US has a military, has there even been a militia? would you trust your random neighbours loading up and marching against something? or would you expect law enforcement to crush it?

seems like the amendment has become “the locals can have guns and murder each other”. Nothing to with a “militia”; or defending your country.