[shuckles]

I only want to marry people of a particular gender, but that doesn’t make me problematically sexist. Religion is a similar desiderata. Perhaps you can argue that people can convert, but as a Jew who seriously dated a Catholic for almost two years, I’d argue that boundary isn’t particularly fluid.

As an example, what if they decided against the marriage not because they cared personally but because their family did, and satisfying their family’s preferences was important to them? What’s the harm? Nobody has an obligation to marry you.