Among Hindus, Sikhs, Jews, Buddhists and people of no religion, the majority felt uncomfortable with the idea of a close relative marrying a Muslim. Among Christians, there was a significant minority.
A majority of Muslims were uncomfortable with the idea of a close relative marrying a Buddhist, Hindu, Jewish or Sikh person, or someone of no religion. Almost four in 10 Muslims were uncomfortable with a close relative marrying a Christian.
Not all that odd really. The colour of your skin is one of those genetic lottery things. What you believe about gender relations, civil liberty and all that is something more changeable. So, believe those things that clash as a result of the Sky Fairy and sure, people should be more interested.