Why did Newt Scamander carry a suitcase full of beasts with him when he knew that they are prone to escaping? Also he lied at immmigration saying that he brought nothing and he put New York City in danger. I cannot imagine how irresponsible this character is.

Why did Newt Scamander carry a suitcase full of beasts with him when he knew that they are prone to escaping? Also he lied at immigration saying that he brought nothing and he put New York City in danger. I cannot imagine how irresponsible this character is.