Yea that's a weird situation no doubt. I don't know I mean I personally HATE all trans things at any age, but then again it is clear these people have deep deep deep mental issues and/or had fucked up parents/childhood growing up. Part of me shows empathy towards the ones that stay away from children and are against child mutilation. In your shoes I would be polite and maybe talk about the subject in time and learn more on how these mentally ill people think, but fuck the he/she if they are in support of child mutilation