JunkMonkey
Lord High Vizier of Nowt
Is there any indication that Wyndham was gay or particularly sympathetic to the cause? It could certainly be read that way, but you could probably say the same thing about a non-conforming political or religious group.
I don't know if Wyndham was gay or not. He did marry a woman (but then so did Oscar Wilde). Wyndham eventually married a woman he'd (almost) lived for nearly 40 years at the Quaker Penn Club, in London. They had separate rooms and didn't marry because if they had she would have had to leave her job. In the weird weird world of 1950's Britain's women weren't allowed to work in many careers if they were married. The Quaker Penn Club, as its name would suggest, was set up by the Quakers, and there, to quote Wikipedia: "a political mixture of pacifists, socialists and communists continued to inform his [Wyndham's] views on social engineering and feminism."
Do you have to be gay to write a great gay novel? I don't think you do. I don't think it's a coincidence that the telepathic characters discover their 'otherness' as adolescents. The thing that marks them out for difference is innate. It is they themselves that are different; not their ideas. What marks them out is not some idea passed down to them, as would be the case if the threat to them was being part of some non-conforming political or religious group. They cannot escape or renounce their otherness.
It's few years since I read it. I must dig it out and give it another go.