I’m American: my dad told me a couple years ago that immigrants were “unclean.” I’m almost 40, and that was the first time he’d ever used that phrase. That’s probably the first time I realized how “mainstream” extremism had become, since he has virtually zero online presence.
Just FYI, "first generation" refers to the first generation born in the adopted country. Which is to say, if you immigrated, your kids would be first generation Americans.
According to USCB, the first generation of immigrants is composed of individuals who are foreign-born, which includes naturalized citizens, lawful permanent residents, protracted temporary residents (such as long-staying foreign students and migrant workers, but not tourists and family visitors), humanitarian migrants (such as refugees and asylees), and even unauthorized migrants.
In some definitions, however, those born to at least one immigrant parent are considered "first generation" – or rather, first generation of an immigrant's descendants (i.e., second generation from the USCB definition)
The term 1.5 generation or 1.5G, although not widely used, refers to first-generation immigrants who immigrated to the new country before or during their early teens, ages 6–12. They earn the label the "1.5 generation" because while they spend their formative years engaging in assimilation and socialization in the new country, they often still maintain native language, cultural traits and even national identities from their country of origin. Oftentimes, in the case of small children, a battle of linguistic comprehension occurs between their academic language and the language spoken at home. Their identity is, thus, a combination of new and old culture and tradition. Sociologist Rubén Rumbaut was among the first to use the term to examine outcomes among those arriving in the United States before adolescence, but since then the term has expanded to include foreign students, as well as other unique individuals.