I was reading Quran translation, I came across with some verses then it came to my mind that brothers and sisters who deal with kuffar should come to realise these ayahs' wisdom.
here is follow
The Truth (comes) from thy Lord alone; so be not of those who doubt.
If anyone disputes in this matter with thee, now after (full) knowledge Hath come to thee, say: "Come! let us gather together,- our sons and your sons, our women and your women, ourselves and yourselves: Then let us earnestly pray, and invoke the curse of Allah on those who lie!" (3/60-61)