Sincere questions about religious belief should not be considered an impertinence.
From the economist.com
Both Clintons have trouble hiding their annoyance at Obama's impertinence.
From the washingtonpost.com
The grandee pondered this impertinence but did not immediately respond.
From the economist.com
When abroad, he loves to whine about the impertinence of the press.
From the bostonherald.com
By the time he was 70, the Athenians had tired of his impertinence.
From the investors.com
Now, she has suffered perhaps the ultimate impertinence, as curators have questioned her age.
From the independent.co.uk
So the uneasy authorities decided that such impertinence must be silenced once and for all.
From the ocregister.com
The colour adds to the impertinence expressed through his gestures.
From the en.wikipedia.org
Excessive boldness may thus be regarded as impertinence or arrogance.
From the en.wikipedia.org
More examples
Impudence: an impudent statement
Crust: the trait of being rude and impertinent; inclined to take liberties
Inappropriate playfulness
(impertinent) characterized by a lightly pert and exuberant quality; "a certain irreverent gaiety and ease of manner"
(impertinent) extraneous: not pertinent to the matter under consideration; "an issue extraneous to the debate"; "the price was immaterial"; "mentioned several impertinent facts before finally coming to the point"
(impertinent) fresh: improperly forward or bold; "don't be fresh with me"; "impertinent of a child to lecture a grownup"; "an impudent boy given to insulting strangers"; "Don't get wise with me!"
Lack of pertinence; irrelevance; An instance of this; a moment of being impertinent; The fact or character of being out of place; inappropriateness; insolence
(impertinent) insolent, ill-mannered; irrelevant (opposite of pertinent)
Irrelevancy; the flaw of bearing no reasonable relationship to the issues or proceeding at hand.