It would be great to have an independent investigation into the IDF regarding these particular instances. However, I highly doubt soldiers were sanctioned to kill children and throw tear gas grenades at close range contravening alleged military protocol. I think we will all have scepticism about these incidences until there is some independent investigations. I agree these events are not evidence to say the IDF is systematically ethnically cleansing.
I can see both sides though of this argument regarding the Gaza Strip. The Palestinians see it as an attempt by Israel to cleanse the region, whereas Israelis probably sees it as creating space between Hamas-- removing the parasite that has buried itself amongst a civilian population. A 2007 report suggests that 62% of Palestinians have a positive view of Hamas (I am not sure how that has fluctuated) because they probably view them as freedom fighters for the autonomy of Palestinians. It upsets me that religious moderates have to probably barrack for radical group because they have no real choice (I believe about 75% of the population in Palestinian territories is Muslim and most of them, just like the new generations of Zionist Jews, want a place to live).
Secular Zionism, for me, seems to be missing the Messianic reasons behind its origins. I guess it has evolved due to new generations of Israelis. Either way, secular Zionists and non-traditionalists do seem to have a cultural affinity that converges with the religious Zionists regarding certain land. For example, East Jerusalem has the Dome and Foundation Rock; you could want to protect that for strong religious reasons or because you have a cultural ties to the land, the narrative (but, then again, some Zionists do not share that view and would relinquish the land; the Likud, Shas and Kadima political parties, however, will not agree with the relinquishing of certain land (i.e. Jerusalem and, for the most part, surrounding enclaves ) based on their professed Zionist platforms). For me, it is sort of upsetting that secular individuals are inadvertently serving a Zionist tradition that was once, and still largely remains, a form of Messianism. It is understandable, however, for new generations of Israelis who have a recent and rekindled cultural affinity with the land to want to protect their home. Although, I still disagree with the original agreements of 1947-48 in re-establishing a Jewish state (within Palestinian territory); it is just something we now have to deal with, somehow.
I am really conflicted on this whole discussion, but I feel hopelessly resigned to the fact nobody is going to budge on this issue. It is a circular conflict and I think it is only enabled by religious doctrine that has been secularised or remains openly religious, i.e. the distinction between Israeli and Palestinian governance.