(If I say something that is right, then God has inspired me. If I say something that is wrong, then it is my own mistake.)

And if your eye causes you to stumble, pluck it out. It is better for you to enter the kingdom of God with one eye than to have two eyes and be thrown into hell,
-Mark 9:47

Jesus is often portrayed by Christians as someone who softened and toned down all those harsh Old Testament laws.

But what they seem to ignore is that Jesus only tightened Old Testament laws. He did this by upgrading the definitions of hellworthy sins of ‘adultery’ and ‘murder’ to include everyday human emotions… that occur naturally, such as anger and lust. Jesus redefined ‘murder’ to include the human emotion of anger…. and ‘adultery’ to include looking at a woman with lust.

So, all those upgrades have only INCREASED the odds of a person landing up in hell…and that too for experiencing natural God-given human emotions.

Ask yourself… what takes more effort?
Actually murdering someone OR just being angry with them?
Actually cheating on your spouse OR just lusting after someone else?

Or do Christians believe all those teachings against anger and lust were only valid for the 3+ years of Jesus’ ministry on earth… and that they were nullified after Jesus died on the cross?

My humble understanding is that Jesus did not think or speak in black and white.
My guess is that, in the eyes of God… murderous anger and lust were always punishable with hellfire.
One can be outwardly pious and refrain from murder and adultery, but if he lived his life in unrepentant rage and lust…. his faith is tainted. There is no way such a person can truly claim to be dedicated to God.