Queer persons suffer and also some queer persons have privilege. Both privilege and suffering can co-exist. Calling out the privilege of a queer person is not to negate their experience. Especially when it is to point of their oppressive behaviour.
Being queer is not the only identity. A vile behaviour needs to be called out. Excusing the behaviour because of the queer identity is not a way to be an ally. It is patronising because you refuse to see the person anything other than being queer.