Umm I respectfully disagree.Y
"Hindu marriage joins two individuals for life, so that they can pursue dharma (duty), artha (possessions), kama (physical desires), and moksha (ultimate spiritual release) together. It is a union of two individuals as husband and wife, and is recognized by law." Marriage in Hinduism - Wikipedia
Regards Tony
Hinduism recognises marriage as the joining of two souls or "atmans."
Since the soul is often considered gender less the prohibition against same sex marriage within Hinduism often comes down to specific interpretation. It can also be argued that as part of the colonial hangover homophobia cropped up or was at least fuelled.
Source: a living breathing Hindu ie me.
(Disclaimer beliefs will vary. Neither you nor I can speak for all Hindus on anything let alone something as sacred as marriage.)