Where EXACTLY in scripture did Jesus say that it was always wrong to kill?
Wasn’t there something about millstones and the sea?
He didn’t and the verse Salvation cites is not Christ negating the laws against murder nor execution of murderers. He was expanding on that law by equating hatreds held by a man towards another was just as harmful and “liable for judgment” as it was if a murder had been committed. Likewise, a man was liable to make good as much as possible with one who has something legitimately against him.
A great many spiritual “Ables” may prevent a great many spiritual “Cains” by following this great maxim...”Be ye kind one to another, tenderhearted, forgiving one another as God, for Christ’s sake has forgiven you” Ephesians 4:32
You want to understand Matthew 5:21-26? Read Ephesians 4:32!