> Horrific, yet sadly not the only time the US government has used bio weapons on their own population.
Hyperbole. You are saying that the US government used https://en.wikipedia.org/wiki/Bacillus_subtilis (the bacterium in question) to attack the US population, which is clearly an exaggeration on several fronts.
They are saying that the bacteria discussed in the article probably shouldn't be called a "bio weapon" and/or that the the situation described in the article is meaningfully different from the other situations brought up.
The wikipedia link talks about how this bacteria was known to be safe, even in the 50s (years before the test in the article) when it was understood to be found in large quantities in natto (the Japanese food).
Hyperbole. You are saying that the US government used https://en.wikipedia.org/wiki/Bacillus_subtilis (the bacterium in question) to attack the US population, which is clearly an exaggeration on several fronts.