yesididsaythat

In theory, communities thrive according to established social norms. When someone else comes in and exploits the social norms to the detriment of the pre-existing community members, those pre-existing community members will want the newcomers to go away. The dynamic applies regardless of whether the newcomer is an undocumented immigrant, a documented immigrant, or a citizen; poor, middle-class, or rich; dumb or smart; good or bad. If you believe your community was good already, then the notion of change increases the risk of something bad happening.

The ability to reject someone before they come in, or force them to go away, is usually never an option you have control over - except for immigration policy in a democratic republic. If we weaken the ability to enforce immigration laws, then we're losing one of the strongest tools for maintaining a cohesive community.

If allowing diversity in your community is so great, then why is the blue city Austin, Texas seeing a simultaneous rise in homelessness and drop in property prices?

If allowing immigrants in without any control is so great, then why would rich metropolises like New York and Chicago react so badly to the busses of immigrants sent to them from Texas during the Biden regime?

If your political party refuses to acknowledge that there are immigrants who believe their first loyalty is Sharia Law, the Chinese Communist Party, or whatever else, then why would law-abiding U.S. citizens take your position seriously?

If your vision of the future presents a better world for non-citizens vs. the citizens who have a right to be here, then why would you expect fascism to loose the next election?

Additionally...

If lecturing the largest bloc of US citizens about why they're inherently privileged and guilty is so great, then why did the political party pushing this loose the presidency in 2016 and 2020?

You can refer to those people has he/him and she/her.