Yes, it is quite possible to both recognise that a main part of Hamas' strategy in this war is for as many of their civilians to die as possible*, and at the same time wanting a ceasefire. I would attribute more moral blame to Hamas for the deaths of Palestinians as this was clearly their plan all along, but that does not mean I attribute no moral blame to Isreal either. I would still caveat this heavily with not knowing any numbers but I would hope, at this point, Isreal have done significant damage to Hamas to agree to a ceasefire. I've thought this for at least a few months now.
On the Sam Harris quote he's clearly talking about Jihadism and Islamic fundamentlaism. I also agree and think almost undeniable, that while these aspects of extremism exist in every religion (that Harris also calls out) that the fringes are much larger in the Muslim world. The greatest victims of Jihadism and Islamic fundamentalism are Muslims themselves and I hope we see a change. As a side note you say it only allows for violence against the person or land, how is violence defined? Is your wife cheating on you classed as violent like I dunno punishable by stoning or lashing a woman. Is being gay, is being an atheist or saying things against Islam violent? Or merely wanting to leave the religion. Hopefully, as time passes, they can pull the same tricks the Christian's have largely pulled today to move with the times and say "oh yeah that bit isn't to be taken literally" obviously big up to all the Muslims who are liberal Muslims today, as I say they are the greatest victims of what Sam is talking about.
*this is evident by not building a single bomb shelter for civilians, operating out of civilian areas like schools and hospitals and using civilian clothing, using them as human shields, not giving access to tunnels, shooting civilians trying to flee areas Israel have warned they are going to bomb and literally doing nothing to protect their population. Imagine if they even built just 1 bomb shelter that could shelter say 500 people, imagine if Isreal hit that shelter it would be game over for Isreal from an international point of view but Hamas don't want to take that risk, they'll do all the things I mentioned above, that will guarantee them enough death that they utilise for their propaganda war. Its sick and as I say I largely blame them for this plan of theirs