May regret this, but Christians have got to learn to think in categories, and there are 2 things that are both bad and often get conflated with one another...
1) Racism, defined in actual Biblical terms (racial pride or racial malice) and not defined in the progressive literally-everything-is-a-racism sense, is a sin and is wrong.
// Philippians 2:3, etc forbids conceit (for any reason)
// Titus 3:3, etc forbid "malice" (for any reason)
2) Governing leaders allowing mass migration to happen in a way that is bad for the citizens they were elected to prioritize and bad for the nation they were entrusted to protect (especially when it dilutes Christian influence on the country in a way that could tipping-point-doom-spiral that nation away from societal truth and goodness via creation of voting blocs)... is not good.
// In one of the least-P.C. verses in the Old Testament, Deuteronomy 28:43-44 describes mass migration leading to the ever-decreasing influence of the people of God in a nation as judgment on that nation:
“The foreigners who reside among you will rise above you higher and higher, but you will sink lower and lower. They will lend to you, but you will not lend to them. They will be the head, but you will be the tail.”
While there is obviously continuity/discontinuity between the Old and New Covenants, this does show a shape of God's judgment and there's no way to read that as anything other than negative.
APPLICATION:
If you look at many responses to this pic, some people are doing #1 and when confronted about it, acting like they're just doing #2. If you're calling people "jeets", don't pretend you're having a strictly policy discussion with no malice involved.
Christless "conservatism" would death-spiral into the abyss, just like the already-Christless progressivism has. The center cannot hold.
And often, people are doing #2 and being accused of doing #1.
There's a difference between a religion and a race, and there's nothing wrong (actually, in many cases there's a *lot* wise) with not wanting certain belief systems imported into your country en masse.
And (downstream of the Biblical differentiation in the roles of the individual, family, church, and state) there's not anything wrong with the citizens of a country opposing the leaders of a country allowing mass migration to happen in a way that hurts their culture, school systems, effects scholarship and job opportunity availability to citizens, etc.
Christians CAN have debates about immigration policy and it not be "racist" at all... and all Christians are commanded to love and pray for the redemption of all people from every tribe, tongue, nation, and language, nailing every type of "malice" in their hearts to the Cross.