Leviticus: 11:10 And all that have not fins and scales in the seas, and in the rivers, of all that move in the waters, and of any living thing which is in the waters, they shall be an abomination unto you: 11:11 They shall be even an abomination unto you; ye shall not eat of their flesh, but ye shall have their carcases in abomination. 11:12 Whatsoever hath no fins nor scales in the waters, that shall be an abomination unto you.
This was before butter, and therefore, accurate at the time.
Butter actually predates the Tora, having being around since at least 2500BC. In addition, they also had olive oil which could add some nice flavor to crab.
There must be a (missing) passage in the Bible where God sez that adding garlic to olive oil or butter absolves abomination.
