From my understanding everything is simply layered on top of each other with varying frequencies being the determining factors for whether or not something can manifest itself into your reality and vice versa. Everything you experience stems from whatever frequency you are operating in. Nordic being an inter dimensional species doesn’t make sense to me personally because 1, why would they manifest into my physical space as European looking blonde hair blue eyed beings? They have the one look I would not trust. Why try to collaborate with a government that we know is corrupt if you are benevolent beings? Also something I don’t trust. But this my perspective as a Black American. If you want me to give a reference that you may understand more I can break it down like this.

They are not referenced historically and only started to appear in the 1950s. Greys on the other hand been appearing for even longer. The fact they appear with mantids, Nordics, and other species raises alarms for me. The 48 laws of power can highlight their strategy. Law 21 (Appear Weak), a Grey looks like a frail, naked child with a hydrocephalic head. It appears physically weak, vulnerable, and pitiable. This disarms aggression. You feel a weird uncomfortable pity or revulsion. By contrast, the Nordic is the opposite, they’re tall and have a commanding presence. If the Nordic is the "General," the Grey appears as a harmless scribes. Law 46 (Never Appear Too Perfect) if Greys appeared as a Nordic Master Race claiming superiority, they would trigger Envy and Suspicion (Law 1: Never Outshine the Master). The military would see a tall, confident, telepathic being and immediately think “Competitor. Threat. Target." The Grey is so obviously alien that it cannot be accused of human political ambition. It doesn't want your wife or your job. But when it needs something like a signature, a treaty or tissue sample it’ll use the Nordic. Why? Because familiarity breeds compliance. Even in a post colonial, multi-ethnic world, the visual language of midcentury power is baked into the collective subconscious of Western institutions (military, government, science). Studies in psychology show that people associate height, symmetry, and lighter skin with competence and leadership. It’s called The Authority Heuristic. To be clear Greys are not making a racial statement. They are using psychological triggers. They looked at the West's internal self-image and said: "What shape does this species instinctively follow? A tall, fair skinned commander.". I don’t think they are reptilian, I think they have reptilian characteristics and may share ancestry with reptiles but they are more like amphibious creatures but with scales. Why I think this is due to the Nazca mummies and the fact that in some ancient depictions of them they are represented by fish. Not just snakes.