Be they Sikhs, Hindus, Muslims, Buddhist or any other religions ...those who are extremists that want to FORCE convert others to their religion have no place on Planet Earth. 

Firstly all.. let's call them spiritual masters never never forced religion on anybody nor adviced their true followers to force convert anybody but always preached with love and let others take their time and make their own decisions.

Firstly all must know that religion is for unconditional love and peace to all ...all else who cause aggro in the name of religion are extremists and therefore they must be avoided at all costs. 

The solution is to round up all the religious extremists from all the religious groups and put them all together in an island with no escape. . after some time visit the island and you will find that they killed each other just because they were religious extremists and couldn't bear to stand each other views.

End of chapter in the history of Planet Earth dealing with religious extremists.