Notice how he didn't say they should investigate because of the possibility of unjustly killed Palestinians. They should investigate to protect Israel's army. How can anyone expect their commission to be unbiased? Mirroring his statement regarding "one of the committee's members stated prior to the investigation that Israel commits war crimes" - I assume he will find a committee composed of members of which none has stated that he or she thinks Israel DOESN't commit warcrimes.
Colombia recalls ambassador to Venezuela amid border crisis (Reuters)
from the article: Deputy PM to Haaretz: Israel must probe Gaza war