No Compulsion in Religion; The Message is clear and for those with sincere good in their hearts

لاَ إِكْرَاهَ فِى الدِّينِ قَد تَّبَيَّنَ الرُّشْدُ مِنَ الْغَيِّ فَمَنْ يَكْفُرْ بِالطَّـغُوتِ وَيُؤْمِن بِاللَّهِ فَقَدِ اسْتَمْسَكَ بِالْعُرْوَةِ الْوُثْقَى لاَ انفِصَامَ لَهَا وَاللَّهُ سَمِيعٌ عَلِيمٌ

There is no compulsion in religion, for the right way is clearly distinct from the wrong way. Whoever therefore rejects the forces of evil and believes in Allah, he has taken hold of a support most unfailing, which shall never give way, for Allah is All Hearing and Knowing. (Noble Qur'an; Al-Baqarah – 2:256)

فَإِن تَوَلَّوْاْ فَإِنَّمَا عَلَيْكَ الْبَلَـغُ الْمُبِينُ

But if they turn away from you, (O Prophet[saw] remember that) your only duty is a clear delivery of the Message (entrusted to you). (Noble Qur'an; An-Nahl – 16:82)

إِنَّ اللَّهَ لاَ يُغَيِّرُ مَا بِقَوْمٍ حَتَّى يُغَيِّرُواْ مَا بِأَنفُسِهِمْ وَإِذَآ أَرَادَ اللَّهُ بِقَوْمٍ سُوءًا فَلاَ مَرَدَّ لَهُ وَمَا لَهُمْ مِّن دُونِهِ مِن وَالٍ

''...verily! Allah will not change the good condition of a people as long as they do not change their state of good within themselves, But when Allah wills a people's punishment, there can be no turning it back, and they will find besides Him no protector.'' (Noble Qur'an; Ar’Rad – 13:11)