Peter Lorre was a great Austrian-Hungarian actor who starred in the 1931 German film M. He was Jewish and left Germany when Hitler took over.
He was a character actor, not a leading man. He had roles in American films such as The Maltese Falcon and Casablanca. He finished his career in low-budget Roger Corman horror films. I didn’t know the information in the tweet which explains the decline in his career.
Sad! 