Years ago, Afghan refugees were explicitly banned from some Iranian provinces and not allowed to work in various high-skill industries: https://www.dw.com/fa-ir/%D9%85%D9%85%D9%86%D9%88%D8%B9-%D8%B4%D8%AF%D9%86-%D8%AD%D8%B6%D9%88%D8%B1-%D8%A7%D9%81%D8%BA%D8%A7%D9%86%D9%87%D8%A7-%D8%AF%D8%B1-%D8%AF%D9%88-%D8%A7%D8%B3%D8%AA%D8%A7%D9%86-%D8%A7%DB%8C%D8%B1%D8%A7%D9%86/a-16097951

Here is a map of where they have been banned from: https://es.wikipedia.org/wiki/Afganos_en_Ir%C3%A1n#/media/Archivo:Afg_mamnu_dar_iran.png

Though it would make the most sense for Iran to field them now. At least it has a better healthcare system than the USA and even used to subsidize food and secondary education for Afghan refugees. If progressives care so much about the environment, why aren't they against using emissions-intensive transport to bring them to Western countries?

Afghans didn't even want to put up a fight against the Taliban?

Afghanistan is simply too decentralized and fraught with ethnic/religious hostility. Which just validates the opinions of sane people about multiculturalism.

Daoud Khan was Afghanistan's last chance to avoid the following decades of misery, but he played his hand quite badly -- antagonizing local ethnic groups and bordering countries -- and was assassinated by the same organization that put him in power. If that didn't happen then a religious uprising would have occurred during his lifetime. Islam was never negotiable, thus Islamic socialism might have been the only way to bring people together and neutralize religious disruption of economic reforms. Later stages could have been funded by their mining industry. Now it's just a smörgåsbord for China.