Steve and Don, you do not find the truth by "trawling the internet," you find whatever you want to find.
It is absurd to imagine that BBC, Guardian, Independent, Ch.4 news, etc., etc., are keeping "the truth" about Israel secret because of sinister and secret global organisations.
You are not deprived of the truth by our media, and you do not find it by trawling the net.

Jim, does anything in Grabowski's testimony suggest that he or those around him were expecting atrocities to be committed?
No. It is convincing evidence that IDF was neither expecting nor prepared for it.

His testimony to the enquiry exposed serious errors of judgement and probably of conduct by his immediate (low level)superiors.

From the Kahan Commission Report.
Late in the afternoon (Friday 17th.)he related what he had seen to his commander in the tank battalion and to other officers. At their suggestion he related this to his brigade commander at 20:00 hours (Grabowsky testimony, pp. 380-388). In various statements made to the staff investigators, soldiers and officers from Lieutenant Grabowsky's unit and from other units stationed nearby related that they saw on Friday various acts of maltreatment by the Phalangist soldiers against men, women and children who were taken out of the camp, and heard complaints and stories regarding acts of killing carried out by the Phalangists. One of those questioned heard a communications report to the battalion commander about the Phalangists "running wild."

The battalion commander did not confirm in his statements (no. 21 and no. 175) and testimony that he had received reports on Friday from any of his battalion's soldiers about acts of killing or violent actions by the Phalangists against the residents of the camps. According to him, he indeed heard on Thursday night, when he was in the forward command post, about 300 killed, a number which was later reduced to 120 killed; but on Friday the only report he received was about the escape of a few dozen beaten or wounded persons northward and eastward, and this was in the afternoon. At a later date, after the massacre in the camps was publicized, the battalion commander made special efforts to obtain a monitoring report of the battalion's radio frequency and he submitted this report to us (exhibit 1240). In this document no record was found of a report of acts of killing or maltreatment by the Phalangists on Friday.

We did not send a notice as per Section 15 to this battalion commander, and this for the reasons explained in the Introduction. We have not arrived at any findings or conclusions on the contradictory versions regarding the report to the battalion commander, and it appears to us that this subject can and should be investigated within the framework of the I.D.F., as we have proposed in the Introduction. For the purposes of the matters we are discussing, we determine that indeed I.D.F. soldiers who were near the embankment which surrounded the camp saw certain acts of killing and an attempt was made to report this to commanders of higher ranks; but this report did not reach Brigadier General Yaron or Major General Drori.