Some quick notes on Matthew 5 and the topic of murder. In these verses, Jesus isn't telling the Pharisees that they had the wrong view towards murder, but rather that they were misinterpreting these rules and laws. The law is built upon the word of God and has moral implications. In Hebrew, there are seven words for "kill", and Jesus reminds them here that this applies to all.
The jurisdictional explanation of v. 22 shows Jesus claiming the jurisdiction as the extreme authority. V. 23-26 speaks about how, if you're at the altar and remember a wrongdoing, then leave and go. The expectation is that you will return after reconciling with your brother. Make peace quickly.