So basically the jest of the talk is: Question everything always
I hate the idea of scientific heresy. Science must operate under the assumption that anything is possible. To say light is always the same and always will be the same ect ect is ridiculous. It's better to always test it and AFFIRM that it has always been the same(if it fact stays the same) while assuming that it may change at any time.
ill say this about his speech. while it is a known fact that once a crystal is made it replicates globally, the mechanism by which this happens has been thoroughly investigated and is the result of microscopic grains of crystal seeding the globe. this is particularly damaging to drug manufacturing since they rely on certain crystal structures to work. I'm skeptical that it happens through some resonant frequency, but it should be tested and considered. and in terms of varying fundamental constants, why would the standard testers discount variations in it? i didn't know there was any contention in these constants but this speech has made me question :)
Tools of war are not always obvious. The worst weapon is an idea planted in the mind of man. Prejudices can kill, suspicion can destroy, and a thoughtless, frightened search for a scapegoat has an everlasting fallout all of its own.