a scapegoat 替罪羊；替死鬼

【例句】
She felt she had been made a scapegoat for her boss's incompetence.
她觉得，本是老板无能，但她却成了替罪羊。

But the fact is that every country in crisis needs a scapegoat.
但现实就是这样，每个处在危机中的国家都需要找到替罪羊。