I'll let the parables answer that question for me:"But those enemies of mine who did not want me to be king over them- bring them here and kill them in front of me" (Lk. 19:27; the Parable of theTen Minas. This parable is actually refering to Jesus, not God the Father.)
"What then will the owner of the vineyard do to them? He will come and kill those tenants and give the vineyard to others." (Lk. 20:15b-16a; The parable of the Tenants.)
"In anger his master turned him over to the jailors to be tortured, until he should pay back all he owed." (Mt. 18:34; The parable of the unmerciful servant.)
And, lest anyone doubt that Jesus is actually making a theological point in the above verse: "This is how my heavenly Father will treat each of you unless you forgive your brother from your heart." (18:35)
"The son of Man will send out his angels, and they will....throw them into the fiery furnace, where there will be weeping and gnashing of teeth." (Mt. 13:42; The parable of the Weeds explained. Cf. also 13:47-50)
And so on and so forth. There is lots more where this came from, so don't be shy to ask me if you want extra scriptural evidence.