I don't trust you and your ilk with any description of supernatural or, for that matter natural extra terrestrials may not be supernatural. You cannot say the same for extra universals who by definition are beyond nature.
It seems that rank and file antitheists have yet to catch up with....well just about everyone.
Not sure what wiggi's 'ilk' is supposed to be, other than, in this case, a casual instance of your supercilious generalisations. Nor do I know what you mean by "extra universals". Are you talking about Platonic Forms? Or simply whatever may be 'beyond the universe' (which by nature we can't know anything about anyway)? No one has got beyond Thomas Henry Huxley on this matter.
Even if 'aliens' came from another dimension (as has been suggested by certain NewAge enthusiasts) it would still not make them 'supernatural'. Can you provide all of us with a working definition (my ilk and any other ilk, that is, including the theistic ilks).