President Barack Obama again denounced gun rights groups for opposing his efforts on gun control, calling them “crazy.”

“The fact that we make it this challenging for law enforcement, for example, even to get — to get alerted that somebody who they are watching has purchased a gun, and if they do get alerted, sometimes it’s hard for them to stop them from getting a gun, is crazy. It’s a problem,” Obama said in the Oval Office today.

Obama complained out that the shooter was able to purchase weapons legally, even though he had been investigated by the F.B.I. for connections to radicalization but didn’t have a criminal record.

“It appear that is one of those weapons he was able to just carry out of the store, an assault rifle — a handgun, a Glock, which had a lot of clips in it,” Obama said.

Obama warned Americans that they were allowing mass casualty acts of terrorism, thanks to the country’s gun rights.

“We are also going to have to make sure that we think about the risks we are willing to take by being so lax in how we make very powerful firearms available to people in this country,” Obama said, noting that it was something he had campaigned for extensively.

He lamented that Americans ignored problems with access to firearms although they were concerned about terrorism.

“We have to go after these terrorist organizations and hit them hard. We have to counter extremism, but we also have to make sure it’s not easy for somebody who decides they want to harm people in this country to be able to obtain weapons to get at them,” he said.