Based on a cursory Google xenobiotic means something that doesn't occur naturally or is occurring in higher than natural amounts.
So the "Xenobiotic Electromagnetism" is basically fucking everything in modern life and not at all what they think they're talking about. Basically anything occurring on the electromagnetic spectrum from x rays to visible light to radio waves.
So Xenobiotic Electromagnetics would actually not include the stupid fucking "chemtrails" they think they're talking about, it would be flashlights, cell phones, wifi, x ray machines, drones equipped with lidar for the county atlas, communication radios from airplanes would be covered, gps, car headlights.... On and on and on.
Fucking idiots.