People are offended because they want an explanation. Jesus raised the dead without technology. He raised Himself from the dead. And the scientific explanation for that is what? One of His disciples refused to believe it. Reasonable? Sure. Then Jesus appeared to him and told him to put his fingers into His wounds.
If God can feed 5,000 people and have baskets of leftovers after, or change water to wine, He can certainly flood the entire world. The tilma of Our Lady of Guadalupe is avaialable, right now. Its existence and survival, cannot be explained. Normally, something made out of cactus fibers disintegrates after some years as opposed to surviving intact for centuries.
Peace,
Ed