equating the USA to the Soviets is just BAD analysis
Karzai was not installed by executing the Russian ambassador
We are not using our troops as a scorched earth invasion force, to blast and steamroll Afghan villages and mine the Afghan countryside, using helicopters to drop mines disguised as toys to maim Afghan children
Both empires were ruled by Communists.
Both empires had their demographics change rapidly.
Both empires were facing grave economic crisis.
Both empires were mired in Afghanistan.
So what's the next thing to happen?