People don't realize that these aren't words, rather they are an action. The only thing is, is that this action is not a Palestinian or a Hamas action, but rather a Syrian one. Syria is telling Israel and the US that in return for a peace treaty, they'll make sure that Meshal moderates.
Nusra Front in Syria says it has detained U.S.-trained rebels (Reuters)
from the article: Hamas denies Meshal said group would consider recognizing Israel