Tumblety

After the lecture of the last book I found two reasons why Tumblety is a suspect in Whitechapel murders: firstly, because he was a foreigner and secondly because he had homosexual contact. Now I found a quote to back up this second reason.
"Littlechild's suspicions against Tumblety seem to have been partially grounded in the doctor's homosexuality and his own belief that those given to 'contrary sexual instinct' were also prone to cruelty."
I found it in the Complete History of Jack the Ripper. The book is convincing that Tumblety was not the real killer and point that homophobia seems to be the reason for believing the murderer was gay.