The analyses of a text #1

The protagonist, Philip, who was born with a club foot, moved in with his uncle Mr. Carey, the Vicar of Blackstable after his mother's death.
He dropped out of King's School at Tercanbury, came to Germany, and stays at the Frau Professor Erlin's lodging house with several guests.

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There was a dramatist whose name of late had been much heard at Heidelberg, and the winter before one of his plays had been given at the theatre amid the cheers of adherents and the hisses of decent people. Philip discussions about it at the Frau Professor's long table, and at these Professor Erlin lost his wonted calm: he beat the table with his fist, and drowned all opposition with the roar of his fine deep voice. It was nonsense and obscene nonsense. He forced himself to sit the play out, but he did not know whether he was more bored or nauseated. If that was what the theatre was coming to, then it was high time the police stepped in and closed the playhouses. He was no prude and could laugh as well as anyone at the witty immorality of a farce at the Palais Royal, but here was nothing but filth. With an emphatic gesture he held his nose and whistled through his teeth. It was the ruin of the family, the uprooting of morals, the destruction of Germany.
"Aber, Adolf," said the Frau Professor from the other end of the table.
"Calm yourself."
He shook his fist at her. He was the mildest of creatures and ventured upon no action of his life without consulting her.
"No, Helene, I tell you this," he shouted. "I would sooner my daughters were lying dead at my feet than see them listening to the garbage of that shameless fellow."
The play was The Doll's House and the author was Henrik Ibsen.
[Of Human Bondage by Somerset Maugham]
1. I'd like to know what "if that was what the theatre was coming to" means.
2. I'd like to know what "it was high time the police stepped in and closed the playhouses" means.
3. I'd like like to know why she said "Aber, Adolf."
Thank you in advance for your help.