The kids are all foreign. When they all go home, we won't have anything left at all.
If we didn't drive them out, they would say here. You're right that we should eliminate the H1-B visas, instead we should just let the smart people live here indefinitely.
The mere act of immigrating means that you are willing to take risks and try new things. That you are willing to make sacrifices. That you are highly motivated. These are the people we need to build the economy.
Unfortunately, the H1-B visa is business unfriendly because it doesn't let immigrants create their own start-ups. It's also worker unfriendly. H1-B workers know they have can't afford to get fired so they take all kinds of abuse at work. And we have to do it too because we have to compete with them.
When we boot them out of the country, most of them don't go home. Once they have immigrated the first time, it's easy to do it again. Most go to Canada, Germany or Switzerland. They only go home when they want to. But when they do you're right that we're screwed. These days anything can be made anywhere and sold anywhere. They'll compete with us directly. They'll have a lower cost of living. They'll pay taxes to their government instead of to ours. When our company goes out of business, we'll have to learn Mandarin or retire early.