The West needs Russia as much as Russia needs the West, the thinking goes, whereas no one (to say the least) needs a sanctuary for Islamist fanatics in the heart of the Middle East. That is why Russia must be persuaded to change course through a combination of economic sanctions, strategic unity, and diplomatic engagement; by contrast, the Islamic State’s ambitions cannot be contained, so they must be suppressed.
基本的理念是西方需要俄罗斯不亚于俄罗斯需要西方，但谁也不希望中东腹地成为伊斯兰狂热份子的庇护所。因此必须通过经济制裁、战略团结和外交接触说服俄罗斯改弦易辙；相反，“伊斯兰国”的野心不可遏制，因此只剩下镇压这一项选择。