I think he’s most known for saying that solanaceae vegetables like tomatoes, eggplants and peppers are very unhealthy and should be avoided at all cost.
He is correctly citing the damage done by lectin proteins to the gut lining. He is simultaneously discounting the benefits of lycopene (for example) found in tomatoes. Most of the latter's toxins are in the seeds, which are strained out in making sauces.
In other words, nutrition is complex, and the maxim "the poison is in the dose" is to be taken seriously. Balance is necessary. Life is fatal anyway. Etc.