I'm not gay, but I do find that to be quite offensive. If you want to keep working with this T then you should point out how it makes you feel. It sounds like she doesn't realise how she's coming across, but it's not very supportive to start diving groups into "your kind" and "my kind", whatever the group. It would be quite an unsupportive comment from anyone let alone a therapist (who is supposed to understand other people's points of view). I agree with your assessment. You should say something.