Hi Lee
That's unfortunate. Don't know what type of blade your using but I've cut a lot of items in oak 1/2" and thicker with a #7 Olsen blade and have never had any problem. Your Nativity crosses are beautiful and would great done in 1/2" oak. Sometimes it's best to walk away, give some thought to the problem. Don't give up, I'm sure you'll solve the problem.