Independence Day is about a kid whose mother burns down the house with her husband in it (and perhaps herself) after finally getting fed up with years of abuse. It's about a woman who finally takes responsibility for what is happening to her and getting some payback from the monster who did it to her.
As for the line "Let the right be wrong". My interpretation of that within the context, is that it was the time for the right thing to do, to be "wrong" from a legal perspective. In terms of linguistic construction, it would have paralleled "let the weak be strong" better if it had been "Let the wrong be right" but poetically it wouldn't have worked, so you use a less apropo construction and allow the context of the song carry the meaning in the right direction.
McBride's latest song "Concrete Angel" is about a little girl who is eventually killed by her abusive parents. Her neighbors and the system intervened too late to save her, but God did and she finally went "to a place where she's loved." So McBride also has Faith apparently.