It will NOT turn out well for all the Muslims let in by Merkel. I will bet Austria will side with them as well.
It WILL get the EU in Brussels panties in a big wad as well.
Once the surrounding countries see how much better off Germany will be, they 'might' have Muslim purges of their own.
Main thing is the US needs to stay the hell out of it! If necessary to also bring all our troops back into England or all the way back into the US as well.