Is it a sin to have a genital preference and thus be trans-exclusionary in a way?

No, it's not. First off, it's not about "reducing people to thier genitals". Sexual attraction involves lending your physical body to a sexual experience, therefore it's your absolute right to dismiss any kind of physical genital or physical traits in a partner you find unattractive. It's not your job to subsidize your connective, sexual, physical intimate relationship just because it excludes a demographic. Weaponizing transphobia because someone has inherent preferences that are by default mostly exclusive is just hot garbage. Hating, aversion, invalidating someone and thier gender is completely different from just not being compatible because you have cis preferences. I like women. Before we even get below the belt, I like breasts, but absolute hate fake ones. I don't want a partner with exspensive blow up boobs that will become recurring surgical need as they need to be replaced every so many years. And as a potential partner, I don't want to be responsible for a cosmetic costs, for something I don't particularly enjoy. So I wouldn't date a cis woman with fake ones. I do like feminine women, but naturally pretty women. Not interested in a woman who has to spend tons of time on hair and makeup. I take 10 minutes to get ready, I preference someone who doesn't need to spend a long time on it. I also want a women who understands exactly what it's like. There's something unique in a wlw relationship with cis women who grew up with a the nuances of being a female. We understand each other on things like our periods or how men treat us. Our world views are specific to our being raised in the same gender. I also love confidence in a woman. I don't want to have to carry the weight of disphoria or affirm my girlfriend's gender constantly. I simply don't want to deal with those kinds of emotional or physical complexities. I also definitely just don't like dick. Period. You don't owe anyone anything.

/r/OpenChristian Thread