I know that you are wrong on several points which make me doubt the rest of your post. For one, you said that exercise will build muscle mass which is not the same as protein. You are absolutely wrong on this point. It is a well known fact that body builders and atletes need more protein in their diet because the excercize
I am not sure what kind of research you have access to. I don't see what kind of research would allow you to see that the body is consuming bacteria and viruses. From what I have been able to gather, there is realy a paucity of research out there when it comes to fasting, and Science cannot agree weather you really detox when fasting or not.
Now the reference provided is writen by a doctor. Are you a doctor?
From my personal experience, I am on a tenth day of a Water Fast and my muscles are undeniably smaller. I have flexed them and measured them, and there is no question that I have lost muscle mass. I do however have moles, skin tacks and other non-essential sources of protein on my body that have not been utilized yet.
I have also read from many other sources of information that you lose muscle mass when fasting and dieting. This makes sense! Just like when there is a fuel shortage people buy smaller cars. In the same way the body downsizes it's calorie consuming engine when there is a calorie restriction.
Finally, what you are saying is too good to be true. According to you, fasting is panacea and there is absolutely no downside to fasting. This does not jive with the common sense. Everything has a downside, including fasting.