Quite frankly I don't believe angry and wrath are interchangeable. Perhaps at one time they were, but not now.
I don't believe "conversation" and "behaviour" are interchangeable either. 400 years ago they may have been, but not now.
Words change. The English language is very fluid.
[FONT="]1 Thessalonians 4:15 For this we say unto you by the word of the Lord, that we which are alive and remain unto the coming of the Lord shall not prevent them which are asleep.[/FONT]
--There is no way that any one here is going to prevent the resurrection of anyone. However, if Christ comes, we shall precede those who have already died in Christ.
The word angry has changed its meaning. To the common person it means one who has lost his temper, or even is close to losing his temper.
From Merriam Webster:
Note that Jesus never antagonized anyone or never was in a rage.
Anger is rage. Anger is a strong emotional feeling usually resulting in antagonism. Displeasure.
These are not the fruit of the Spirit, nor the qualities of the Lord.
We are not to emulate this type of behavior.
Today's use of it (even if what you say is true) has nothing to do with it.