You do realise that the cultures, historical references and mythologies of the pre-Christian Celtic peoples point to the fact that same-sex relationships, in whatever form they may have manifested in cultures so different from ours today, were not seen as anything remarkable. We do not find the condemnation that is found in Middle Eastern religions nor do we find the disdain or slurs of the Viking/Norse traditions either. (Even in the Norse traditions, there seems to be an ambiguous stance towards same-sex relationships, with the figure of Odin being notable in particular.)
In the Classical literature, both Aristotle and Diodorus describe the openness of same-sex relationships among Celtic warriors. In Welsh mythology, Gwydion and Gilfaethwy, through a serious of magical transformations, end up as a same-sex couple – transformed – and having children. In Irish mythology, Cú Chulainn is heartbroken when he has to fight Ferdiad because he describes Ferdiad as his “heart-companion” with whom he “once shared a bed”! Finally, in the Irish Brehon laws, the only really mention of homosexuality is as just cause for a woman to divorce her husband, yes, in native Irish law women had far more rights than in other cultures of the same epoch; however, there is no condemnation of homosexuality itself and that’s it – no other mentions. In post-Christian times, the negative attitude starts to appear, but prior to the advent of Christianity, the little evidence we have suggests acceptance and without wishing to argue from silence, the silence on these issues is also noteworthy.
Therefore, I’d say that there is no place for homophobia, transphobia or any other orientation/gender-based phobia in our druid/bardic traditions as it is actually contrary to the beliefs, practices and traditions of our Celtic ancestors. There is also no place for it regardless of our ancestors because we are living in the 21st century.
Peace and blessings.