That's a pretty bold statement, you have any sources to back that up?
The first international was about uniting international workers, there are in fact several writings who say that the bourgeoisie use nationalism and anti-immigrant sentiments to divide the working class.
you said, quote:
"The first communist international was mainly about antiimmigration."
now the citation you give is they _amongst other things_ wanted to prevent the import of foreign workers to break strikes.
Apart from "amongst other things" does not make it "the main thing", it also was very much not anti-immigration. The international workingmen association formation was about forming an international organisation to prevent "capitalists" from playing the workers in different countries against each other. In other words they realised that unless workers organise internationally, they would always be on the back foot.
The first international was about uniting international workers, there are in fact several writings who say that the bourgeoisie use nationalism and anti-immigrant sentiments to divide the working class.