If you drive 22 mph in a 20 mph school zone, but are unrepentant of that excessive speed drive, would you also 'lose' your salvation?
You lack a certain something. Please find it.
The speed limit is man's law.
A murderer breaks God's law, and indeed one of God's most important laws. Were any of the commandments greater than any other? Jesus said so, "This is the first and greatest commandment." The Jews also had greater penalties for breaking the commmandment "Thou shalt not kill", over that of "Thou shalt not covet thy neighbor's goods."