I think Liberace was an ‘open secret’. No one cared because he was excellent at what he did. He didn’t speak to the press about his orientation...he didn’t need to. Women thought he was cute, men respected his talent, even if they saw something ‘odd’ about him. He didn’t flaunt his gayness as in shoving it in your face to get you to agree with him or accept him.
Find some of his old shows and watch the guy play. He was one of the best on the planet, bar none.
As for Peter Lorre...heck, I didn’t know!
His character in The Maltese Falcon (Joel Cairo)was a little light in the loafers, but in the book, there was no doubt.