First thing to understand is that Arab media lies. They tend to report much higher number of human shields and low number of palestinian terrorists. Dead palestinian terrorists under 25 is consider youth and below 20 toddlers.
In Israel number reported are ~1500 of which very few civilians added after Oct 7th. These were mostly a direct hit or cardiac arrest due to excitement. I think nearly 70 soldiers died since Oct 7 in the fighting inside Gaza.
If we put death toll in Gaza & WB at 15000 I estimate 10,000 were active palestinian terrorists