Because you will die a horrible death if you try.
You should read you bible more - those things and more were commanded by your God.
You will find that Western values were actually a product of the Hammurabic Laws, not what your evil God said!
Yes, God is evil - who says so? God!
1 Samuel 16:14
But the Spirit of the LORD departed from Saul, and an evil spirit from the LORD troubled him.
1 Kings 14:10
Therefore, behold, I will bring evil upon the house of Jeroboam, and will cut off from Jeroboam him that pisseth against the wall, and him that is shut up and left in Israel, and will take away the remnant of the house of Jeroboam, as a man taketh away dung, till it be all gone.
2 Chronicles 34:24
Thus saith the LORD, Behold, I will bring evil upon this place, and upon the inhabitants thereof, even all the curses that are written in the book which they have read before the king of Judah:
Jeremiah 4:6
Set up the standard toward Zion: retire, stay not: for I will bring evil from the north, and a great destruction.
Jeremiah 18:11
Now therefore go to, speak to the men of Judah, and to the inhabitants of Jerusalem, saying, Thus saith the LORD; Behold, I frame evil against you, and devise a device against you: return ye now every one from his evil way, and make your ways and your doings good.
Jeremiah 47:37
For I will cause Elam to be dismayed before their enemies, and before them that seek their life: and I will bring evil upon them, even my fierce anger, saith the LORD; and I will send the sword after them, till I have consumed them:
Jeremiah 45:5
And seekest thou great things for thyself? seek them not: for, behold, I will bring evil upon all flesh, saith the LORD: but thy life will I give unto thee for a prey in all places whither thou goest.
Jeremiah 44:11-13
* Therefore thus saith the LORD of hosts, the God of Israel; Behold, I will set my face against you for evil, and to cut off all Judah.
* And I will take the remnant of Judah, that have set their faces to go into the land of Egypt to sojourn there, and they shall all be consumed, and fall in the land of Egypt; they shall even be consumed by the sword and by the famine: they shall die, from the least even unto the greatest, by the sword and by the famine: and they shall be an execration, and an astonishment, and a curse, and a reproach.
* For I will punish them that dwell in the land of Egypt, as I have punished Jerusalem, by the sword, by the famine, and by the pestilence:
And of course, good old Isaiah 45:7.
I form the light, and create darkness: I make peace, and create evil: I the Lord do all these things.