Ahead of Thursday’s four-year anniversary of the racially motivated mass shooting that killed 23 people at an El Paso Walmart, 162 civil-rights organizations are demanding that members of Congress stop using anti-immigrant hate speech. On Wednesday, U.S. Rep. Joaquin Castro, D-San Antonio, joined leaders of those groups to decry the use of “invasion” rhetoric thrown around by members of Congress and by Gov. Greg Abbott to describe border crossings. By invoking that terminology, advocates argue, politicians are mainstreaming white supremacists’ so-called “great replacement” theory — a debunked claim that shadowy forces are permitting an invasion of immigrants in a bid to suppress white Americans.