All groups which are doing violence on many places and upload videos on social media are not belongs to islam ...
Yes. Islam say to cut their person head if he/she murdered an innocent person how ever forgiveness has own importance in Islam ..... Islam give message to do jihad to give all education of Islam all over the world but jihad can be done only and only under Islamic state or islamic country....
But now a days few people make groups and start doing violence as a name of jihad ...
Brothers there are no connection of these people in Islam ....
They make the name of Islam bad ....
Hope these people come on right path .......