What's black and grey and orange and looks good on top of a police officer? The world trade center.
Do you like mocking victims?
By mocking them? No, I'm mocking the government that convinced everyone terrorism existed.
Terrorist attacks are traumatizing events for everybody and it can be triggering to even talk to them about it much less joke about it, or imply they are not real. Making light about it can be hurtful, just like you would be hurt if people made a joke about something that caused you pain.