Most often, the best thing to do is to walk away from antagonistic folks. Many people are quite contentious these days. They will pick a fight with you or cause strife over anything. Do not take the bait!
Especially as we enter the holiday season and nerves can be frayed, look for ways to bring peace to the situation rather than angst. As a follower of Jesus Christ you are to walk with your feet shod with the Gospel of peace and reflect Him. Check your heart, for it is always a heart issue. If you are constantly thinking it