This sounds like yet another “nuke your intestines and hope for the best” thingies.
In this case, hydrogen peroxide is mentioned. Like chlorine dioxide, hydrogen peroxide may kill both bad and good bacteria, and it may attack your own body cells that line the inside of your intestines.
If you have a serious bacterial infection like staph, would you consider taking antibiotics, or would you say to your doctor that the antibiotics are going to nuke your intestines and live with the infection?
In such a situation the antibiotics will (not may) kill both bad and good bacteria.
Just wanted to know how you look at things.