The Simon Wiesenthal Center on Friday called on President Barack Obama to convene a summit to deal with rising levels of anti-Semitism around the world. “Last year was a disastrous year. We are confronting an unprecedented and toxic combination of terrorist threats, an online sub-culture of hate and theologically and ideologically fueled anti-Semitism. … To defeat anti-Semitism, we need to build new coalitions,' explained the center's associate dean Rabbi Abraham Cooper. 'We call on President Obama to convene a summit on anti-Semitism in the coming months.”