I'm going to tell him to go back to his own country, is there anything wrong with this?
You are totally not serious are you? Tell me you aren't serious. Why are you going to tell him to go back to his own country?
I don't like his kind of people.
You may have your own opinions, but it is xenophobic to want people to go back to their home country. They have every right as you to stay in your country, and it's unfair to judge them just because of their homeland. How about trying to befriend some immigrants and learn some interesting world views?
It's dumb, they need to speak English.
I'm sure they are trying their best to speak it. English is a very difficult and irregular language, so perhaps you can go ahead and help them? They might teach things to you in their language too!