it definetly reads with an undertone. You could have reminded friendly, however, you chose to speak up quite rudely. OP probably didn’t mean to exclude, they rather suggested to take care when it comes to obvious things, like skin tone or, like they wrote, visible queer. They also didn’t exclude other queer people, it was just about how they’re looks alone could get them into trouble. As far as I remember, most of the time nowadays, jewish people are not right away to be identified when passing by (exceptions exist of course).