How to remove a gunite pool
Rebar doesn't cause kickback with a concrete saw, but it does slow things down. What causes most kickback is binding, which will be somewhat difficult to avoid when cutting horizontally. My shoulders ache just thinking about it. 

I'd probably stripe it vertically and cut off the bars at appropriate sizes to minimize horizontal cutting. You'll go though quite a bit of diamond blade, though. Consider renting a small backhoe with a jackhammer attachment.