When we declare terrorists to be of no religion, why should rituals be performed on their bodies according to their religion once they hanged?

Do they really deserve to get to heaven? If so, doesn't their souls create terrorism in heaven? Do their souls let other souls rest in peace if they have been allowed to heaven? 

Why put their bodies in boxes and bury them in the ground to believe that their God will come and take them to heaven?

Instead, Government authoritise should use electric cremation units to dispose their bodies as we do with viruses.

Government authoritise should frameup an act for burning bodies of terrorists to ashes as they are not belong to any specific religion.

If you want to stop the terrorism they do for the sake of the heaven, please sign up this petition and let's prove to them that this earth itself is the heaven.