Question

who supported restrictions on immigration and seem to forget that America was built by immigrants plss i need help

Answer 1

A lot of people have done that in American history.  Perhaps the most relevant at the present time (late 2018) is the current Chief Executive of the United States, including his administration, bureaucrats, spokespersons, apologists, supporters and sycophants.

(Whose own grandparents were immigrants, and whose current wife is currently one, if ya catch my drift.)

Just this minute, as I was writing this answer, I just had the most awesome idea !  Give immigrants the vote, and THEN watch his attitude change fast !

Answer 2

Answer:

the nativists.

Explanation:

The nativist movement supports the restrictions on immigration and seems to forget that America was built by immigrants. They fear that immigrants will spoil the existing cultural values.In places where immigrants are more than the original inhabitants, nativist movements seek to prevent cultural change. Nativists fear immigrants could end native populations due to a lower birth rate among natives.