# stone him to death with stones

"throw stones at him until he dies"

# you will remove the evil from among you

"you must remove from among the Israelites the person who does this evil thing" or "you must execute this evil person" 

# All Israel

"All the people of Israel" 

# will hear of it and fear

"will hear about what happened to the son and be afraid that the people will punish them also"