One inevitable part of life is conflict. Sometimes our convictions and beliefs will be different than those around us. The bible tells us in Romans 12:18: "If it is possible, as much as depends on you, live peaceably with all men." If you need help with conflict resolution allow the Holy Spirit to guide your speech and body language and you will be able to conduct yourself in a God honoring fashion--instead of remaining in conflict and allowing your speech to deteriorate to the degree that the person feels attacked.
Ephesians 4:29 Let no corrupt word proceed out of your mouth, but what is good for necessary edification, that it may impart grace to the hearers.