His point was that it was a significantly lower percentage than the Gaza demographics, showing Israel had not indiscriminately targeted civilians. Furthermore, he also made the point that many of those under 18 were nevertheless combatants.

EDIT: This is to be expected if Israel wishes to minimize global political opposition to their operation. Such opposition is expected, and so they won't want it to be any greater than it already will be.

His point was that it was a significantly lower percentage than the Gaza demographics, showing Israel had not indiscriminately targeted civilians. Furthermore, he also made the point that many of those under 18 were nevertheless combatants.