It would not be OK to plan a "jew hunt" on WhatsApp and perpetuate violence by performing a "flash mob attack" against not only against Maccabi hooligans, but also non-violent Maccabi fans, and also Jewish and Israeli people who aren't even visiting for the football. And completely random people who you just think look Jewish or Israeli.
No, that's not acceptable. That's retributive bullshit. An eye for an eye leaves us all blind.