“What a blessing it is that my bones become shrapnel that blow apart the usurping Zionist Jews,” a suicide bomber said in a video released by Hamas this summer after his failed mission in Tel Aviv, which killed only him. But the attack signaled a change, the Wall Street Journal reports. Hamas had quit carrying out suicide missions a couple of decades ago after they proved a political failure—killing people on the streets of Israel but not leading to concessions from the government. Some leaders of the militant group feared the political cost was too high. That changed when Yahya Sinwar, the ma…