Jim, if you want your forces to use chemical weapons, you have to train them.
You also have to manufacture them.
Neither activity can be kept secret for long.
The Japanese terrorists made their own stuff.
You can be certain they rehearsed their quite complex plan when they hit the subway.
An earlier small scale attack, which was unsuccessful, also amounted to a rehearsal for the main event.

Flouride is not particularly toxic, but like anything there is a safe limit.
It is in toothpaste and drinking water because it is good for your teeth.

You are starting to look irrational again Jim.
How you must hate us.