Again, it's an extreme reaction and an example, but generally, my point I am trying to get across is that immigration is a net boon to societies for the economic argument. For the foreign policy aspect, even deporting bad immigrants can lead to blowback, and has led to blowback. It can even be small. Voting for an anti-US candidate in the election, which nationalizes the country's establishment, and makes it more anti-US, which can lead to the US losing basing rights, docking rights, trade dispute resolution, joining BRICS, etc.Carrot and stick approaches require you to understand what you incentivize. The US deported me, therefore I'm a terrorist now isn't a rational reaction. Terrorists overseas aren't a product of lack of US immigration. If you encouraged immigration specifically for the purpose of monitoring terrorists, you incentivize terrorism, provided it is desirable to be in the US...
When the US kicked a bunch of indians back to their country, who were mostly old, the indian media was livid. Granted, the country's leadership is highly opportunistic in terms of geopolitics, but their media spun the story, and it leads to where it is now: Indian paid trolls who spam on behalf of Russia, China, and for radical actors in the US like Fuentes and MAGA to break apart the US, again if you can' defeat the US military on the battlefield you get their country to be more divided.
I believe MAGA is organic, and Trump's support is organic, but many pro-Trump accounts, I suspect, are being influenced by Russia, India, and China to attack and divide the US beyond what many MAGA and even a radical actor like Fuentes want. And even if it wasn't, it benefits Trump, and he and the Republicans want it; it always seems like they hate candidates that want diverse immigration to the US.
Many of these malicious actors astroturfed against Harris, Clinton, and Biden. The Iranians were doing it against Trump, but that's because the mullahs' strategic thinking was poor, as Biden oftentimes was more efficient at confronting Iran on a multilateral level.
The reason for all of this is simple: the way the US assimilates immigrants is widely effective for its own power, and for it;'s economy for several reasons, even for the lowest-capability immigrants, refugees, etc. Again, I was born in a poor village in China. I later moved to a bigger but still small city, and then moved to the US. I don't consider myself that dynamic even now, but coming to the US made me a lot more dynamic.
Yes, we are a nation of laws, but how we execute each law is different. If someone killed someone and then showed remorse, vs someone who didn't, vs someone who laughed about it, all things being equal, they will likely receive different punishments.
It's also why I don't find Silvanus' arguments that convincing. The US due process system is oftentimes wonky, inconsistent, and highly biased by a whole number of factors, but the immigration judges and immigration lawyers are still human beings who have biases. My guess is they don't find uprooting people that peasant. Also, imprisonment is bad, but the US lacks the political will to do proper immigration and staffing of USCIS, judges, etc, and hates good administrative processes, which is why they have to resort to holding people vs processing them more quickly with adequate staffing. Which is why we have a social security number that is both a national ID number and, national ID account number that is proof we can't do administrative processes right.
I also don't want to keep immigrants mainly to stop them from being terrorists; it's an example like joining a gang as well. It's to stop anti-US blowback and better US power. If you commit a crime, you should go to jail, not be uprooted for most cases.