Shouldn't God be to one to judge, why is death sentence suggested in Bible?
God should be the one to judge by some Bible quotes, but this is also one on many contradictions, because there are many reasons for death sentence in Bible:
Exodus 21:15-17:
"And he that smiteth his father, or his mother, shall be surely put to death."
"And he that stealeth a man, and selleth him, or if he be found in his hand, he shall surely be put to death."
"And he that curseth his father, or his mother, shall surely be put to death."
Lev 24:14-16
"Bring forth him that hath cursed without the camp; and let all that heard him lay their hands upon his head, and let all the congregation stone him.
And thou shalt speak unto the children of Israel, saying, Whosoever curseth his God shall bear his sin.
And he that blasphemeth the name of the LORD, he shall surely be put to death, and all the congregation shall certainly stone him: as well the stranger, as he that is born in the land, when he blasphemeth the name of the Lord, shall be put to death."
Deut 22:20-21
"But if this thing be true, and the tokens of virginity be not found for the damsel:
Then they shall bring out the damsel to the door of her father's house, and the men of her city shall stone her with stones that she die: because she hath wrought folly in Israel, to play the whore in her father's house: so shalt thou put evil away from among you."