Sorry-you are right. they are a waste of time for parasites-not for overall health. root canal could be the issue-I know you got it after cfs started but you get a root canal after the jaw is infected not before.
Many serious docs think root canals are as bad as smoking.
Search youtube for Margolis he has several good videos-one on root canals and one on infections and what issues they cause-chronic fatigue being one of the things he mentions.
FYI-I see him next week