"their most controversial ingredient is Soy Leghemoglobin. To make this ingredient, Impossible genetically engineers a yeast bacterium to produce a protein". So? What is the problem with that? It is scary because is made by a bacterium like most of the industrially produced vitamin C? Or is it because the bacteria has been genetically modified, like the ones who produce insulin for people suffering from diabetes? And what about "natural" meat produced from animals being fed with GMO soy then?
"In general, I think unwise to mess with the complex system of human biology by introducing large qts of foreign ingredients". Again, "foreign"? What do you mean with that?
Then it continues with "all non-organic" and so on, like the process is relevant, while the final result is not, similar to homeopathy.
I am very skeptical about this kind of criticisms.