http://www.straitstimes.com/asia/east-asia/big-blow-to-hong-kongs-faith-in-one-country-two-systems
When Islamic extremists broke into Charlie,
Placards "Je suis Charlie (I am Charlie)"
were holded.
When Kenji Gotoh was kidnapped,
Placards "I am Kenji"
were holded.
When Chinese authority detained the Hong Konger bookstore owner,
Placards“我们都是林榮基(We are also Lam Wing Kee)”
were holded.
It seems to be common to be victims for showing concerns about them.
But, I want demonstrators to act as if they were rescuers.