Mrs May refused to accept complaints that politicians were overstepping the line after the head of Scotland Yard attacked "extremely hurtful and untrue" claims that police had been timid.
Danczuk called the claims "malicious, untrue and extremely upsetting".
Responding to the claims, the MP for Rochdale said: "These claims are malicious, untrue and extremely upsetting.
During the bitter campaign for Bradford West, Galloway accused Shah of making an "untrue and extremely serious" allegation against him on a popular Urdu TV channel.
"An allegation made by Naz Shah in Urdu on a well-watched Asian TV show is both untrue and extremely serious," he said.
In his letter, he described Smith's claims that he fostered hatred and provoked crime as "entirely untrue and extremely damaging".
Danczuk was also interviewed under caution last month over an accusation of rape, which he has described as "malicious, untrue and extremely upsetting".
The embattled 49-year-old Rochdale MP, who previously said the rape claims against him were "malicious, untrue and extremely upsetting", is currently suspended from the Labour Party while he is being investigated regarding sexually explicit messages to a 17-year-old.
The interview, in which Obama justified his non-interventionist foreign policy, caused anger in the UK, with one of the cabinet ministers most closely involved with Libyan planning saying the US president's remarks "had been extremely unfair and completely untrue".
Any suggestion that Mr. Perry is racist, added Mr. McClure, who is black, "is not only untrue but also extremely unfair".
