Yes, the topic of my psychology class is human sexuality. Our professor says there is nothing in the Bible that says homosexuality is sinful.
Ich empfehle die Literatur auf der Website des Bundes Katholischer Ärzte (BKAE). Der Vorsitzende, Dr. (I) Gero Winkelmann, spricht auch öfter im Fernsehen.The majority of humans are not catholic and I think most people know, that the catholic believe is the extreme part of Christianity. The protestant church, which is a part of Christianity too, does not seem to have any problem with homosexuality.
There is also no proof that homossexuality can be cured, even though this association apperantly tries to cure it.
Having an "organization" with more or less extreme opinions say something is not exactly proving anything. Especially religious organizations are mostly very biased, for obvious reasons.Except acting against religious rules, homosexuality has absolutely no negative consequences for anyone. And since not every human being is religious or understands the religious scriptures the same way, you should not argue with acting against a religion in this case, in my opinion.