(CNSNews.com) - "Brussels was an absolutely crime-free city, one of the most beautiful cities in the world. And now you look at it, it's a disaster," Republican Donald Trump told "Fox & Friends" on Tuesday morning, just hours after terrorists attacked the airport and a subway station in Brussels, Belgium.
At least 26 people died and many more were injured when terrorists detonated explosives in the main terminal near
"Our government has absolutely no idea what's happening. But they're coming into our country, they're coming in by the thousands. And just watch what happens. I'm a pretty good prognositcator. Just watch what happens over the years, it won't be pretty."
Trump repeated his pledge to "close up our borders to people until we figure out what is going on. Look at Brussels, look at Paris, look at so many cities that were great cities...and they're in fear."
Trump said the U.S. is taking in people, and "we don't know where they're from, who they are...They could be ISIS, they could be ISIS-related."
He also mentioned the millions of migrants from Syria and elsewhere in the Middle East who are flooding into Germany and other European nations: "And the assimilation is very, very difficult, and in some cases it's impossible."
Tuesday's terror attacks came just days after the arrest in Brussels of Salah Abdeslam, the top suspect in last year's Paris attacks.
Trump called it "ridiculous" that Abdeslam was hiding in plain sight, protected by friends and family in a Muslim neighborhood that police are afraid to patrol.
He noted several times that Muslims are not assimilating into the countries where they end up: "They're very untrusting of people other than Muslims. My message is not to them. My message to us is -- we better get smart, and we better get smart fast. My message to them is, they have to be -- they have to be more open with the police, they have to -- they have to become part of the community. They have to let people know when they see people making bombs in the first floor of an apartment. They have to let people know. And they don't do it."
The result is San Bernardino and Paris, he added.
"You know, we're not the victims here," Trump said. "We're acting like we're the -- like it's our fault, because that's the problem with the liberal policies of the country and this world. Its not our fault, OK? It's not our fault. It's their fault. And they have to come out and say this is happening."
Trump said he expects the problem to get worse and happen in other places."And it's really the policies of people who don't know what they're doing...They see what's happening -- and yet, they allow it to continue."
Asked what he would do if he were president of the United States today, Trump said, "Well, I would...you know, I guess I would just talk to the people and give them, frankly, a pep talk. You know, we need a pep talk. We need spirit in our country."
He repeated that it's time to look carefully at the people who are coming into the United States.
"Look, people will come in, but we have to be very, very careful as to who comes into our country, or we're going to hav problems like you've never seen. We probably already will have. But we're going to have problems like you've never seen before."