Read the fine print: "He recommends fish, low-fat dairy products and, occasionally, some red meat."
I don't know how others structure their high protein diet, but the above describes how I do it (plus 50g of protein per day from why shakes).
As far as cancer, get your antioxidents in (green tea, vitamin c, blueberries etc), keep your overall dietary fat intake low (less than 20% of the total), moderate (or eliminate) alcohol consumption, don't smoke, and your cancer risk rate will be less than 90% of the population.