Why if you're saved by accepting jesus ,is all the hate and other showing off stuff necessary?

Going and spreading the good news is called the Great commission, As it states in the Bible faith without works is dead. Say if you love someone or something what would you do? you talk about it. People who are in Christ and devoted to him cannot not help talk about him and what has happened in their lives., it is out of love that we speak of and for him. Our salvation is by grace and mercy and we all fall short. However it is because of the grace and mercy that emboldens many to talk of Christ even to there demise. There is power in the name of Jesus.