According to the Bible sexual immorality, lewdness, theft, envy, slander come from the heart... But it doesn't, it comes from the brain... your heart has no control of your body or thoughts. This also leads to a scientific error in the statement. Food passed through the stomach and is broken down to send to all parts of the body through blood which passes through what organ? Heart disease is primarily (Here in the US) caused by cholesterol buildup. That cholesterol comes from many sources. primarily oils and fats. Once that food is in the bloodstream it is passed to every part of the body including the organ actually in charge of making you do good or bad things.
But past that, You are referring to Mark 7 if I'm not mistaken. Where the Pharisees are asking Jesus why he allows his followers to eat with dirty hands. He is establishing a difference in the traditions of man and the law of God. Did he ever say to go against the Laws of God? No. He did say however at 1 point that - until the last day no part of the law would be removed. Pork, was against the Laws of God, not against traditions.
