"Abbas condemns the attacks in English while encouraging them in Arabic." Here's a quick question for you: does Abbas even speak English? I certainly have never heard him do so, and he certainly DIDN'T do so on Israel radio when he condemned this massacre. He spoke in Arabic, and someone then translated his words.
20 killed, dozens wounded in bombings in Sanaa, Yemen (Reuters)
from the article: Netanyahu is ignoring Abbas' efforts to end Palestinian incitement