Proverbs 10:11 The mouth of the righteous is a fountain of life, but the mouth of the wicked conceals violence.
For people who are genuinely trying to follow Christ, talking about Him and sharing all He has done for us is not a problem.
For those who want to follow religion instead of the truth, a whole string of conflicts starts to surface and soon takes over.
Stretch that a bit further and the conflicts turn to hatred and violence; this is where extremism comes from.
Follow Christ and as He stands for, leaving the world and religion behind you!