Thank G-d for King David. When Samuel went to anoint the next king he went thru all of his brothers, asking G-d is it this one. Every time G-d answered no. Samuel 16:7 But the LORD said to Samuel, "Do not consider his appearance or his height, for I have rejected him. The LORD does not look at the things people look at. People look at the outward appearance, but the LORD looks at the heart."It got to the point Samuel had to ask isn't there another son? Jessie answered well there is David, he is just a shepherd boy out in the field. We know the rest of the story.
There are some laws, like Kosher laws, Shabot, circumcision at are for us Jews only. Not like universal Laws like to 10 commandments. There are Laws in Torah that are for the Jews only because we are to be identified as separate from other nations. Then there are moral Laws for all nations.
personal side note: I love tattoos on other people. But I will never have one, for me it is a sin. My personal opinion, not the Word of G-d. If it is a satanic tattoo I would have it cover up or removed. You are now sporting G-d.