The public doesn't want to see your weapon any more than they want to see your gun. They may ignore either but that doesn't mean they want to see them.
OC is no more going to "desensitize" them than listening to the yapping dog next door is going to "desensitize" me to its barking. What the yapping has done is, in fact, to make me hate the thing more. As a result, I call the police now every time it wakes me up, which I never used to do. Clearly, the public and politicians in CA reacted in a similar vein.
"Risk comes from not knowing what you're doing." — Warren Buffett
"You can't go as deep [in] training as in a race or a fight. If you don't compete it's easy to convince yourself you're going hard. You're not." — Mark Twight