The difference is between withdrawing in an orderly manner...and running away, leaving thousands of Americans behind.Here's the problem, it didn't matter whether Biden yanked us out quickly, or Trump's slow drawdown would have done so in an orderly manner.
The overall problem would have still been there, a 7th century barbaric religion that vehemently oppresses girls/women and preaches hate towards other religions. You could spend a century there and they would still be living in the 7th century. They are brainwashed five times per day via prayer and via government enforcement.
Hell, Muslims have been killing each other for centuries, as each side claims that the other "isn't a true Muslim." If they didn't have that issue to focus on, they would use all their tactics to focus on non-Muslims.