There are at least three things that you could compare to the Alien and Sedition Acts from the late 1700s.
First, you could compare them to the Espionage Act and the Sedition Act that were passed around the time of WWI. These later laws made it illegal to do things that would tend to reduce public enthusiasm for the war effort.
Second, you might compare them to the McCarthy Era. In this time, people's political expression was limited. They were, essentially, not allowed to be members of the communist party if they wanted to be able to have careers.
Finally, (though this is more of a reach) you could compare it to the idea of "political correctness" today. You could argue that today's values (not laws, though) make it difficult to express "incorrect" points of view.