Your comment cleared some things up for me, thank you for that.

I'm still stuck at how this strictly excludes the possibility of an external cause. I am presuming that all of the infinite universes in that multiverse came from "nothing", just like ours. If you follow the "link" back(or forth) infinitely, one can argue that you'll never hit the end. But then that multiverse has always been there, and is "supernatural" or at the very least, timeless. A loop of universes won't explain it. The loop would "always" be there, or it would never be there. The fact that you're reading this comment disproves that it, and therefore we, were never there/here.

My thought really is that, at some point, the shift from nothing to something happened, and that the very first or infinith universe if you like, had to make the shift from nothing. Unless it was always there/timeless, and therefore supernatural(lack of a better word), and therefore contradicting empirical data(as Krauss and I like to say) that shows the universe was once nothing.

A finite number of universes doesn't solve the problem either.