Trump's suggestion was not about registering immigrants, it was about registering people because of their religion, even American citizens.
No it wasnt prove it or STFU
Yahoo News asked Trump whether his push for increased surveillance of American Muslims could include warrantless searches. He suggested he would consider a series of drastic measures.
“We’re going to have to do things that we never did before. And some people are going to be upset about it, but I think that now everybody is feeling that security is going to rule,” Trump said. “And certain things will be done that we never thought would happen in this country in terms of information and learning about the enemy. And so we’re going to have to do certain things that were frankly unthinkable a year ago.”
Yahoo News asked Trump whether this level of tracking might require registering Muslims in a database or giving them a form of special identification that noted their religion. He wouldn’t rule it out.
“We’re going to have to — we’re going to have to look at a lot of things very closely,” Trump said when presented with the idea. “We’re going to have to look at the mosques. We’re going to have to look very, very carefully.”