Israel's actions weren't the only things you weren't paying enough attention to -- you've apparently never actually read Morris' books. He's extremely biased in favor of Israel. He constantly rearranges the sequences of events, chooses words, comes to conclusions that simply defy the facts he has just cited, etc to make Israel's case look as plausible as possible. Sometimes he becomes almost unreadable on this account. You just can't figure out what he is actually saying. What's more, he has always frankly stated that he is a partisan of Zionism. He'd probably grant that he's hardly trying to be even-handed. He just refuses to participate in outright lies. That's all.
International investigators to probe several cases of Syria chemical attacks (AP)
from the article: A pragmatic vision for Israel's Left: A reply to Benny Morris