Conversation so far:
What was Lenny Bruce arrested for?
On October 4, 1961, Lenny Bruce was arrested for obscenity at the Jazz Workshop in San Francisco.
Did Lenny Bruce get jail time after being arrested for obscenity at the Jazz Workshop in San Francisco?
Although the jury acquitted Lenny Bruce, other law enforcement agencies began monitoring his appearances, resulting in frequent arrests under charges of obscenity.
What other times was Lenny Bruce arrested besides the Jazz Workshop in San Francisco?
Lenny Bruce was arrested again in 1961, in Philadelphia, for drug possession and again in Los Angeles, two years later.
Any other arrests for Lenny Bruce besides the Jazz Workshop in San Francisco, Philadelphia, again in Los Angeles?
On December 5, 1962, Lenny Bruce was arrested on stage at the legendary Gate of Horn folk club in Chicago.
Did Lenny Bruce's arrest record have any negative effects for Lenny Bruce?
Despite his prominence as a comedian, Lenny Bruce appeared on network television only six times in his life.
Who was Solomon to Lenny Bruce?
Lenny Bruce was arrested along with the club owners, Howard and Elly Solomon, who were arrested for allowing an obscene performance to take place.
What is considered to be obscenity in Lenny Bruce's arrests?
In the Los Angeles arrest, comedian Lenny Bruce used the word schmuck, an insulting Yiddish term that is an obscene term for penis.
Any other words that were considered to be obscene by Lenny Bruce besides schmuck?
At the Jazz Workshop arrest in San Francisco, Lenny Bruce had used the word cocksucker.
Were words the only reason Lenny Bruce was arrested for obscenity?

Question: Why was he considered to be an undesirable alien?
Self-contained rewrite: Why was Lenny Bruce considered to be an undesirable alien?