They get angry if they think they are being treated disrespectfully.

如果他们认为被无礼对待，他们会恼怒。

《柯林斯英汉双解大词典》

We know that no one is perfect, but in my whole life I never heard you raise your voice at Grandma or treat her disrespectfully.

我们知道人无完人，但在我的一生中，我从未听到您对奶奶提高嗓门或对她无礼。

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Does she treat your friends and family disrespectfully? Rudely?

她对你的朋友和家人不尊重吗？粗鲁吗？

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The general and his aides spoke disrespectfully about several administration officials.

VOA: special.2010.06.26

Lena Horne refused to play roles that represented African-Americans disrespectfully.

VOA: special.2010.05.23

People who feel that they have been treated disrespectfully are more likely to develop hostile reactions, possibly including cyber-abuse.

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"Innocent people who are stopped can be treated disrespectfully, " he said, noting that the police department has begun instituting polices to fix the problem.

WSJ: Silent Treatment for NYPD