It is safe to say that everybody likes to be liked, and likes to be right. These are two instinctual desires (amongst others) that play a huge role in how we communicate with others.

There are several aspects to your question that can be explored for answers.

1. The opinion (the actual message).
2. The opinion of the sender (how the message was sent).
3. The opinion of the receiver (how we interpret the message).

The art of communication is to focus on the actual message. It will contain two outcomes, a truth or an untruth.

How we receive this message depends on how well we honestly know ourselves.
Here are the options from a true person, one who knows themselves.

1. If message is true and they already know about it, they will not see it as an attack, and accept it.
2. If message is true and they don't know about it, they will recognize the truth and thank the messenger for the revelation.
3. If the message is not true, they will not see it as an attack, but as an untruth from the messenger, and accept that.

Here are the options from a person who does not know themselves (i.e., most people on the planet).

1. If message is true and they already know about it, they will not see it as an attack, and either
   • accept it.
   • say they already know and/or
   • expand on it.
2. If message is true and they don't know about it, they either
   • thank the messenger for the revelation.
   • ignore/deny the messenger.
   • attack the messenger in hope to stop receiving further messages.
3. If the message is not true, and they know it as untrue, they either
   • accept that, and let it go.
   • not accept that and either correct them and/or attack them.
4. If the message is not true, and they don't know it is untrue, they either
   • accept that, and let it go.
   • not accept that and either ignore/deny and/or attack them.

If I left something out, please accept my apologies, and let me know.

Note: if the messenger is attacking, they are expressing some anger, from their fear of some truth about themselves; regardless if the message (received or sent) is true or not. IMHO