Does calling someone Fool, make me a murderer? ~ Cross reference of Matthew 5:21 to Exodus 20:13

The sermon on the mount is an amazing teaching. I think Jesus was trying to tell the people the true meaning of the Torah. I look at his teaching in the below 2 ways.

1. He believed this is how G-d intended us to live where murder does not mean taking another persons life, but that we should live in peace with one another. I believe this is how G-d intended the world to be and this is how the world will be in the messianic age when all humans will know the ONE TRUE G-d of the universe and will not have the desire to sin. So I wonder if Jesus thought he was the messiah and he would usher in the the messianic age?.
2. The other way is rather cynical but quite possible that Matthew [Church Fathers] put these words in his mouth to show that without him we are hopeless and hence we need to accept him to be saved.

All Images are links to Google Images. Copyright violations not intended.

All Greek Text references are from NIV and Tanakh references are from Chabad.

This post is not intended to offend anyone's faith but for those people who are Seeking the truth of THE ONE TRUE G-D of the universe to who we owe all our love, gratitude & devotion.

My encouragement to you is that you read the whole chapter of Tanakh that the Greek text quotes so you get the context and understand what G-d actually said.

G-d Bless and Seek THE Truth.

Matthew 5:21 “You have heard that it was said to the people long ago, ‘You shall not murder,[a] and anyone who murders will be subject to judgment.’ 22 But I tell you that anyone who is angry with a brother or sister[b][c] will be subject to judgment. Again, anyone who says to a brother or sister, ‘Raca,’[d] is answerable to the court. And anyone who says, ‘You fool!’ will be in danger of the fire of hell.

Exodus 20:13 You shall not murder. You shall not commit adultery. You shall not steal. You shall not bear false witness against your neighbor.

1. Is it practical for anyone to live in the current fallen state of the world by the standards of Jesus's teachings?
2. When G-d gave the Torah, he said one should not murder because man is made in the image of G-d. He also gave the punishment for anyone who murders intentionally and a way for a person who accidentally kills another man to escape from being killed by the relatives of the person who he killed. 
3. Jesus preached that we should not be angry with ANYONE. I guess this will be even people who exploit us. So anyone can exploit us and we need to keep your peace and not be angry?
4. Are Christians living this kind of life or they can be angry and still go to heaven because they believed in Jesus?
5. How can Christians claim that Jesus’s commands are light and full of love.
6. Jesus said his burden is light and Paul says the Torah kills people instead of giving life. So I guess the conclusion should be that forget about the laws and just believe in Jesus and his blood on the cross and you will be saved from hell.
7. Why did Jesus not practice what he taught? He seemed to curse people as fools in the below verses. 

Matthew 23:17 You blind fools! Which is greater: the gold, or the temple that makes the gold sacred?

Luke 11:40 You foolish people! Did not the one who made the outside make the inside also?

Luke 24:25 He said to them, “How foolish you are, and how slow to believe all that the prophets have spoken!