The Holy Quran emphasizes on doing good; hence, the call of Islam is a call to good against evil, and good is for all people.

 فَلَن يُكْفَرُوْهُ {never will it be removed from them}: Meaning, it will not be covered, so this good will be known, and will be spread among people, and it will not be hidden from our Lord. As such, the Arabic word (kufr) may mean to cover, and the evidence here is that Allah (swt) followed it with His saying:

وَاللّهُ عَلِيمٌ بِالْمُتَّقِينَ {And Allah is Knowing of the righteous.}