The statement "X can do what they want with their Y." is simply ceding to X that which was already his. The statement "X can do what they want with their Y BUT

The statement "X can do what they want with their Y." is simply ceding to X that which was already his. The statement "X can do what they want with their Y BUT they shouldn't because Z" is ceding to X that which was already his, and in the same breath revoking that cession. Essentially: They don't have to change it, but they should change it. Consider instead: "BUT this isn't what I'm looking for in a community, and it's not a community in which I will continue to participate - I encourage others to do the same." That statement would have both acknowledged the owner's right and done so without attempting to indirectly dictate what the owner should do with his property.