Source: Tafsīr of Surah al-Hadīd by Shaykh Muhammad ibn Sālih al-Uthaymīn رحمه الله

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“In this is complete justice in the judgement of Allāh عز وجل whereby He said (what means):

وَكَثِيرٌ مِّنْهُمْ فَاسِقُونَ

“And many of them were Fāsiqūn (rebellious & disobedient to Allāh” [al-Hadīd: 16]

He didn’t generalize. This is what is obligatory upon the one who speaks about a people, that he clarifies the reality. Because some people are such, that if they see deviation in a people they generalize the ruling upon all of them. What is obligatory is to be just; if most of them are Fāsiqūn, he says most of them, if a lot of them are Fāsiqūn and not most of them, he says a lot of them, (it is) according to what the situation dictates. What is obligatory is that one speaks with justice even if it is against himself or his parents or relatives.”