What happens if you want to court a Muslim girl who's parents don't agree with inter religious marriage?

Usually her family will kill the daughter for bringing shame to the family rather than have her marry someone who is not from the same religion. Typical stuff in Islam, pretty barbaric considering the times we live in. However it happens all over the world when muslim kill there own family members. I saw in the news paper that a muslim mother and father purposefully drowned their 3 teenage daughters because they were not adhering to strict Islamic teachings. Where these 4 teenage girls just wanted to be like any other wester teen there parents killed them.

Without having to sign her death warrant in Islam how to do marry a Muslim woman without converting to such a loathsome and barbaric religion that puts life on the back burner.
What happens if you want to court a Muslim girl who's parents don't agree with inter religious marriage?
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