Haha they even have changed their avatar to protest.
Those two are targeting PS.
Those two are tarteging the french licencing authority (ARJEL), "m'a tuer" means "killed me"

the reference here is what is written on cigaret packs in france.

here the reference is a famous murder which happened 20 years ago, where the victim supposedly wrote the name of the murderer on the wall with her own blood.