Is it true that some people say it is obligatory in da'wah to point out the error while naming the one who erred, otherwise it is a betrayal of trust?

The questioner:
Yes. Some people say that in da'wah, it is obligatory to point out the error of the one who erred and to name him by his name, and that if you do not do so, you have betrayed the trust and neglected the community. Is this statement correct?

The Shaykh:
It is not correct. The Messenger of Allah (peace and blessings be upon him), when he wanted to warn about someone's error, did not name him. He would say, "What is the matter with a group of people doing such and such?" and he would clarify the error. He would clarify the error without mentioning names, because that involves incitement, stirring up, and fitnah (trial, discord or temptation). So if you say, "What is the matter with a group of people doing such and such?" no fitnah or anything of the sort occurs.
The warning is achieved without fitnah. It is not among the means of da'wah or part of the methodology of da'wah to name the one who erred. This is not part of the methodology of da'wah. The methodology of da'wah is that you clarify the error only and do not specify the evil. "What is the matter with a group of people doing such and such?" Yes.