Yes it is glyphosate. It damages both the immune system and the microbiome. and yes chronic diseases and immune problems have been rising since glyphosate's introduction. But it is not just glyphosate. So much in U.S. food damages the microbiome-immune network. and just because glyphosate is immunotoxic does not mean that GMO food is wonderful and safe. They use every tool possible to damage our bodies.
Glyphosate is definitely a problem but it is certainly not the only problem considering other food additives and drugs/vaccines. The herbicide is both immunotoxic and antimicrobial (damaging the microbiome) and promotes several chronic diseases because of the immune damage.