> Bacterias bring us health
Unless it is e. coli, salmonella, listeria, botulism, etc etc. Some bacteria is helpful, most is neutral and some will make you very sick or kill you.
> I think we need the bacterias and all the life on the food
There is just as much bacteria on your skin, on the doorknob and on the basket holding you bananas to service your "daily dose of bacteria". Seriously, bacteria is everywhere. There is good evidence that ultra-clean lifestyles can increase allergies as you mentioned, but that is where you try to sterilize everything. It isn't where you simply cook food.
> Today I'm living on 90% fruits
Please make sure you are getting enough iron, or you could be on the road to anemia and serious health complications. :)
> When I eat dairy or something cooked my poop goes bad on the next day, it's like our body is the best doctor around.
Or, different foods have different molecular structure, which is digested and metabolized by different pathways in your stomach and intestines, leading to different aromatic by-products. Just because you don't like the smell doesn't mean there is something "wrong". I don't like the smell of manure all that much, but it is a very "good" by-product, if you want to label things good or bad.