Well, they don’t say it now, but ahmedis consider us non-ahmedia kaafirs as well for not believing in the Mirza.
As far as christians going to heaven, allah knows best as there might be exceptions, but then what is the use of islam? Christians already do shirk with the Trinity concept, so that is automatic hell for eternity. As far as attackers go, the laws are there so the police / govt needs to toughen up and put the inciting mullahs and mob into prison for long times. Give death penalty for inciting death.