jjotto, also please show us where the commands of God that demand someone be put to death for accepting Christ are found in Scripture.
God did not say he chose a scripture. God said he chose a people.
One of the Seven Laws of the Children of Noah is to establish courts of justice. These would not be Jewish courts, but rather courts established by each nation according to their own preferences, provided they intend the goal of justice and an orderly society.
Godly courts in the Land of Israel administered by Jews would indeed be stricter than those of the nations.
http://www.aish.com/jl/jnj/nj/80405497.html?s=rab