Mat 7:6 Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you.
Do you feel like you have to always have the last word in a discussion or an argument? Resist that temptation. Those that have ears to hear will hear, but those who are blinded to the truth will resist it at all costs.
You possess the pearl of great truth in that you have Christ as you Savior, the Holy Spirit as your guide, the second coming as your hope and the Word of God as your anchor. The whole body of your other-worldly possession is so holy, of such great price, you dare not cast it before those who will blasphemously trample it underfoot. Moreover, they will turn and rend you, the messenger.
Let them yell and scream and spew their faithless idiocy, yours is to guard the truth and proclaim it to those who have ears to hear.
In Titus we are instructed that, A man that is an heretick after the first and second admonition reject; (3:10)
We owe everyone a chance, a hearing of God's truth. But if they blatantly disregard and denigrate His precious truth, we are safe to shake the dust from our feet and to move on to more receptive hearts.
Don't argue with bloviating idiots who love to hear the sound of the sewage as it spews from their own lips. They are reprobate and God likens them to dogs and pigs. Bow-wow, Oink-oink!