الآية رقم (21) - فَذَكِّرْ إِنَّمَا أَنتَ مُذَكِّرٌ

(21) - (So remind, [O Muhammad]; you are only a reminder. (21))

Defining the mission of the Prophet (saws) that is just to remind people of the covenant of faith in the innate of human beings. After that, it is not his responsibility whether they believe or disbelieve. So how it comes to say that we fight people to believe while Allah (swt) says:

 {وَقُلِ الْحَقُّ مِن رَّبِّكُمْ ۖ فَمَن شَاءَ فَلْيُؤْمِن وَمَن شَاءَ فَلْيَكْفُرْ}

(And say, “The truth is from your Lord, so whoever wills – let him believe; and whoever wills – let him disbelieve.”) (Al-Kahf: 29)

  {لَا إِكْرَاهَ فِي الدِّينِ}

(There shall be no compulsion in [acceptance of] the religion.)
(Al-Baqara: 256)