Fully understand the in vitro effects, but Bt has been used by organic gardens for several decades without ill effects in humans. It is devastating in catepillars.
… Bt has been used for years as a naturally-derived pesticide; the big difference here is that Monsanto’s gene-splicing wizards made corn and other food-bearing plants grow the Bt internally. When it’s used in organic agriculture you can just wash the Bt off with water; you can’t do that when it’s inside ever cell of the corn you’re eating.