My take:
I can't believe anyone outside Hamas would claim Israel actually targets civilians. With the military might they have, and the trapped environment that is Gaza, even the most incompetent amateur could wipe out scores of civilians. I'll even accept they're taking pains to avoid civilians.
The problem is that, despite their efforts, they are killing scores of innocents, including children. If you just count the children killed, and ignore the adult civilians, this week of Israeli strikes has killed more than total Israelis killed by Hamas rockets in period of 2002-2014 (if you believe
Wikipedia). And with each death, new terrorists are made.
So Israel is killing scores of innocents and creating new terrorists to somewhat dampen the ability of Hamas to harass but do
relatively little meaningful damage. That's an awfully poor calculation, IMO, regardless of who you want to anoint the "Holder of the Moral High Ground".
The only thing Israel really gains is political points domestically. The gov't gets to show it's citizens that it's tough on Hamas. It's basically the equivalent of the Tough on Crime stances you see here, and particularly in the US, with politicians wanting to score political points with tougher laws, minimum sentencing provisions, three-strikes provisions, etc., that keep prisons overflowing in order to "protect our streets". The problem is that all you do is put a tonne of people into an environment where, when the eventually come out, they are more hardened and lack integration skills.
You don't have to be a lover of criminals to see the problems with current imprisonment focused policies, and you don't have to be an anti-semite see the problem with Israel's heavy military bombardment policy as ultimately counterproductive.