I used to eat everything, if you had told me 5 years ago I would not eat meat I would have laughed at you. But I have been looking into this for many months, and everything I am seeing is leading me to believe that we are all just mugs that have been brainwashed by advertising. The process has been like peeling an onion, there are layers and layers of untruths. For example you might THINK it's right to drink milk, but it seems to cause cancer and osteoporosis. Remember, we were once told that smoking was good for us.
A very good book that explains why we like meat and dairy and fatty foods so much is "The Pleasure Trap" by Douglas J. Lisle ad Alan Goldhamer.
Here's a sample video. This is one of many.
You can find more in my blog. But watch out, cos knowing all this feels like taking the red pill in the Matrix, and there's no going back to a state of ignorance. Now I see myself 5 years ago as being a processed person (see http://www.processedpeople.com/). I am busy at the moment, but if anyone wants to question what I think please do.
In summary I think meat, fish, dairy, salt, animal fats and oils are giving us cancer, heart disease, stokes, osteoporosis, diabetes Alzheimers and loads of other things, and I have been misled all my life because I simply took things for granted and didn't question things. However the good news is I think I can reverse most of these things in myself (if present) by going on a generally plant based diet with very occasional meat or none at all. I think people who believe claims such as protein in meat is good for you are victims in the same way smokers were back in the 60s and 70s. If you can convince me otherwise that would be great, as a bacon sandwich would be fantastic. On the other hand, if I am wrong it would mean I get sick as I get old, and end up like all the other sad old people.
PS - there are some lnks in my original post which may help, for example you can click on "nutritatian" to get the definition.