Political correctness is getting in the way of the war on terror, former New York Mayor Rudy Giuliani charged on Friday.

Appearing on Fox & Friends, the man in charge of New York on 9/11 said that calling violence what it is may have prevented incidents such as the Fort Hood massacre or the Boston Marathon bombings.

"I see it as a problem that affects the bureaucracy. In other words, it becomes an issue where not everyone, but too many people who are doing these investigations become nervous," Giuliani said.

"We have all these euphemisms that we come up with. We'll never talk about a war on terror even though they're at war with us?"

Giuliani said the U.S. has been facing this danger for some time, yet he believes President Barack Obama's administration is reluctant to voice and identify the threats.

"We have a president who never uses the words 'Islamic extremist terrorist,'" he said.

Speaking of a conversation he had in 2007 with then-U.S. Attorney Chris Christie, Giuliani said Christie told him the big threat facing the country was domestic-inspired Islamic extremism. Christie, now governor of New Jersey, played an instrumental role in making arrests in the attack at Fort Hood and a planned attack at Fort Dix.

"The fact is we've been facing this danger for some time, and political correctness gets in the way of handling it because if you can't properly identify the characteristics of a serial killer, you can't catch a serial killer," Giuliani said.

"These Islamic extremist terrorists are ideological serial killers."