Fermented vegetables?

Dr Joe Mercola says that 2 oz of fermented vegetables is equivalent to a bottle of 100 high potency probiotics.
So what? you may reply.
Well, I find it interesting that the doyen of the Alkaline Diet movement, Dr Robert O Young, vehemently asserts exactly the opposite; that any fermented food of any kind, right up to apple cider vinegar, turns good organisms in your blood to baddies.
Who is right?