Yes, but you posed your question slightly wrong so dumb and dumber jumped all over the topic to show how smart they were. You should have said "Are DMT entities, Aliens, Gods or something else." You see, dumb and dumber have a fairly narrow world view, and the idea that DMT entities might come from anywhere other than your brain is very disturbing to their world view since they would be unable to explain it. In the indigenous cultures it is pretty much accepted that the entities are external and there to provide assistance. If you were to suggest to them that the Heroku where in their head, it would be taken just as poorly as suggesting they are aliens here. It's a cultural thing. Interestingly, the shamans of the tribes who use the snuff or drink, when asked how the discovered the plant explain that it is done by listening to each plants song. Under the influence, they can hear the plants sing. This of course would be considered absurd in our culture, plants don't sing right? In their culture however it is a widely known fact and it appears indeed to lead them to plants containing DMT. In their reality, plants sing and they have the proof boiling in a pot.
Every culture has it's own cosmology. And each culture considers theirs to be correct. Most likely, none of them are completely correct. Our senses are tuned to a very small portion of what is out there. The only thing we know for sure is that we are not seeing much of reality. When someone has a mindset that their senses show them a true picture of everything that is, they are traveling down the road to delusion. I won't be one to argue with your experience or deny it. You experienced it, therefore it is real. Is your experience a more accurate or less accurate view of the underlying reality, I have no way of knowing. Are the entities internal or external or something totally different? We don't have the tools or knowledge to know for sure.
What is important is what you get from these entities. If viewing them as external aliens gives you benefit then let them be aliens. If you see them as some part of yourself mirrored back and that helps, that's fine too. There is no need to apply logic or reason to the experience, the experience is what it is. The only thing in the end which is real is what you take from the experience and how you incorporate that into the non DMT world.
When you deny the validity of something, you loose all opportunity to learn from and about it. This is why an anthropologist doesn't say, no, those are just hallucinations you get when you drink that shit. To do so would totally destroy any chance of learning about the subjects world view and perhaps something about your own. When you dig into other realities, you learn there are holes in your own. You find that the plants do sing, even though you can't hear them.