Yeah, his delivery method is kinda like trying to catch flies with vinegar instead of honey for some. I'm going to error on the side that he's just a little overly passionate to help. Haha
Be sure you eat mostly greens. Cook/steam them if you have to. I've been making homemade green smoothie to increase my intake of greens. A great way to eat them raw too. Greens are the only type of vegetables that's can be combined with fruits without digestion problems. Otherwise juice root veggies with greens and no fruit, but put some of the pulp back in because fiber is really important to heal fatty liver.
What did you juice and what pain did it aggravate? What's your general diet been all this time? If you have a post that explains more what's going on with you, it would be helpful. PM me the link if you want.
Don't know anything about coffee enemas, but doesn't sound like you'd have to avoid unless they are too hard on your adrenals.