FRANKFURT—The last German civilian plane carrying Afghans fleeing Taliban rule landed in Frankfurt on Friday, a day after the country’s armed forces said they had finished their evacuation operation at Kabul airport. The final German military aircraft carrying soldiers and German and Afghan civilians left Kabul for Tashkent on Thursday. An Afghan student who was on the onward flight to Germany from Uzbekistan said he never wanted to return to his homeland after seeing his desperate countrymen sleeping outside Kabul airport for days. “The past few days were very burdensome,” said the 28-year-old. “People have been spending the night near the airport for days to maybe get a chance to get near the entrance and then get inside somehow. It is very tough for us and when you see the people there, it’s hard to take.” Germany says it has received assurances from the Taliban that Afghans with legal documents …