Israel should not use ambulances for military purposes. Israel is far far from perfect and you can find many examples of things we can agree on being "wrong". Perfection is not the right measure though, Israel doesn't do things like: https://www.bmj.com/content/380/bmj.p451 The question is compared to what its peers in the "free democratic west" would do in similar circumstances how does Israel measure. We know that most of the world doesn't even try to hold up the same standards.