Your friends are doing their best to connect with others and share their newfound perspective using whatever crude tools are available to them. Be kind.

Psychedelics give you a new map into reality. If nobody teaches you how to read the map, it's easy to get lost or misread it. Integrating a bunch of different maps can be very challenging.

Charitably, what they probably mean is that if we model god as the sum total of all experiences and all things, then it can be said that we are all aspects of divinity.

The tree recognizes itself as a tree and as part of the forrest.