The anti-gay stuff certainly doesn't surprise (how could it? We are talking about the Catholic Church ...). It is interesting (disturbing?) that he encountered alot of other gays in the Church and that they would walk around calling each other "bunny" and other cute names.
It also worries me that anyone in the Church still believes the 'Jewish Conspiracy'.
The Catholic Church is just continuing its long decline. It will be irrelevant within decades. Sadly I wonder if rationality will replace it or US-style extremism.
Indeed that would be my number 1 concern.
A quick google, and I find a press report from Germany of him loosing his job after he came out as gay.
and this is a book I found by a David Berger on the subject of Thomas Aquinas (his alleged speciality) though whether it is the same theologian I do not know.
I can't swear to it, but as to him being a theologian of note and that he did openly criticise the church after he came out, as best as I can do with this cursory survey, I'd say tentatively those facts are borne out but the sceptical caution is well placed.
Is there a web-resource where you can check someone's credentials for a story like this? I don't know.