here is my question why do atheists and christians argue over a matter of faith?

I keep seeing christians (mainly) and atheist asking rhetorical questions of the existence of G-D. Why do you as believers, argue with people that are non believers when it say in th new testament, "But reject foolish and ignorant controversies, because you know they breed fights. 24 And the Lord's slave must not be a fighter but kind toward all, an apt teacher, patient, 25 correcting opponents with gentleness. Perhaps God will grant them repentance and then knowledge of the truth 26 and they will come to their senses and escape the devil's trap where they are held captive to do his will. Timothy 2,. And to atheists why waist time arguing with someone you consider proudly ignorant of scientific evidence. Someone that you consider to be weak for needing faith in a higher power. Faith is the key word. Because they believe without having seen. In the end its the equivalent of an adult arguing with a child to either belief group. May G-D open your eyes so that you may see.