A valid counterargument to the statement that immigrants cost Americans jobs is that
Immigrants are willing to do the jobs that Americans won't
do, for wages that American's would not accept. They take
the jobs that Americans don't want.
I believe the answer is: one-fourth of all new businesses are started by immigrants
For example, Google, which arguably the largest tech company in the world today, was co-founded by a russian Immigrant named Sergey Brin. People in some media like to focus on how immigrants affect the availability of low-skilled labour because it most likely give the most support from the supporters of a certain political party.