Evidence?

I do not necessarily disagree, by the way. From what I can see, the Spartans created a system of institutions designed specifically to create the finest citizen-soldiers in the world, dedicated solely to the defence of their homelands.

Yet there can be, and have been, legitimate questions about exactly where Spartans drew the lines regarding homosexuality and pederasty. I have seen compelling arguments on both sides; contemporary material from Plutarch suggests that pederasty was insitutionalised, while Xenophon argues that this was not something to which the Spartans were well-suited. Modern historians such as Helena Schrader argue that there is no evidence at all to suggest that the Spartans practiced either homosexuality or pederasty.

Greece wasn't accepting of homosexuality, as is popularly believed.

Depends on what you mean by "accepting". Heracles, one of the most prominent figures in all of Greek mythology, was reputed to have numerous male lovers. And the tale of the Theban Sacred Band is well-known.

It's worth noting that much of the evidence that we have for homophilia in Greek society comes from the accounts of a single writer- Plutarch. I would argue that this casts some doubts on the reliability of his accounts, but that's another question.

Overall, I do not disagree with the argument that the Greeks were not all that tolerant of homosexuality. I simply think that they were far more tolerant of it than succeeding cultures and civilisations, including our own.

Greece wasn't accepting of homosexuality, as is popularly believed. They called them 'broad-assed', or 'pit-assed', and in lore the anus was associated with shame. So if someone practiced anal sex, they were shameful and therefore excluded from Greek society.