Global Climate changes also could be caused by Geomagnetic Excursion or a Full Geomagnetic Reversal of the Poles

So, my thought is that if this is true the governments of the world are keeping this as a secret from mankind by telling people that it's ONLY a CO2 change and that's all whereas I believe it ISN"T JUST THAT it is many many things happening simultaneously not just one thing and not just CO2 build up which could also be caused itself by a Geomagnetic excursion or a Geomagnetic full Reversal.

But, because we are talking about 1000 to 10,000 years while it changes what do you tell the people so they don't panic as much? You tell them it's just CO2 buildup and not the rest. 

For example, could the DNA changes caused by a reversal or full Excursion be causing some people to become mass murderers and then commit suicide by self or police? And is this sort of thing only going to get worse as more people's dna changes?

I'm thinking this may or may not be true. However, if you do the research it is mostly happening here in the U.S. not other places.

So, why is it happening here in the U.S. so much? What is causing these behavioral changes to certain  mostly male individuals mostly here in the U.S. but other places on earth periodically too?