I agree.It says if we hold a malicious anger towards a brother we have murdered.
You hate that. Don't you?
Stop murdering the truth, please.
.......
As to the word MURDER...
in English it could mean something other....
(the test was murder)
In other languages (at least the ones I know) it could only mean TO KILL ANOTHER PERSON.
This is also why it's not so easy to understand scripture....
it's necessary to know HOW words were used in the time of Jesus.