Let's look at three of the things this article claims are "debunked":

  >Green tea - drunk in vast quantities it may cause a
  >condition called fluorosis, which can lead to brittle
  >bones and teeth

No one is telling you drink Green tea in "vast quantities". Most recommend an 8oz cup a day, which is perfectly safe.

  >Kale - this so-called wonder food is goitrogenic,
  >meaning it contains substances (goitrogens) that may
  >contribute to an enlarged thyroid in some people, if
  >eaten by the sackful.

Again, no one is telling you to eat kale by the sackful! Drinking a sackful of water a day might cause problems for you as well, but no one is dumb enough to try to claim that water is unhealthy.