The people of this country have the right to hold any beliefs they choose, but those rights don't extend to trampling on the rights of others, advocating the abuse and extermination of another group, nor the planning and execution of violence towards people in this country. It also doesn't mean we are obligated to welcome with open arms a group of people who advocate our own annihilation or the murder of any group of people in our country.
If a group of people fleeing a disaster showed up at your door asking for shelter, would you take them in? Most of us, if our circumstances allowed, would do our best to help out and do so. However, what if you knew with a reasonable certainty that at least 1 or 2 of those people were a serial killer, a rapist, or a child molester? Would you still let them into your home and put your wife & children at such a risk? Of course not. Most of us are willing to help when we can and sympathize with those in a tough situation, but we don't put our family in harm's way to that extent. Protecting them is our number 1 priority and we'd never knowingly allow a rapist, child molester or murderer into our home.
So why would we as a nation knowingly allow a group of people into our country when it's been shown over & over that many of them hate & despise us, have no intention of assimilating and contributing to our country, advocate the murder and extermination of a segment of our population, and almost certainly contain a significant number of people who have sworn to kill as many of us as they can and destroy our nation?