It wouldn't be a problem for me, if I saw with my own eyes His parting of a sea, sending bread from heaven, bringing water from a rock, making sure shoes didn't wear out ... well, you get the picture.
You could honestly run a defenceless new born baby through with a spear, watch it writhe in pain and agony as you spear it through once more, it coughing up blood as it slowly dies, content that your god told you to do so..???