Could it not be both? Interstellar as well as Interdimensional? The universe is almost unconceivably vast, why wouldn't there be both? I don't fully trust Alex Jones but they way he laid it out in a recent podcast made a lot of sense to me. When you enter altered states of consciousness using substances like DMT a lot of people describe running into little elven type creatures but according to AJ these guys are just "the janitors" if you want to meet the big dogs, it requires things like ritual sacrifice, which we can see evidence of in ancient Mayan culture. On the other side of the coin, those with pure intentions sometimes describe seeing beings made of light. How hard is it to believe that these are actual alien entities that we are making contact with?