Obama has just facilitated a faster takeover. Knowingly. Once it became known that Obama and Qatar were working together to set up a Taliban Embassy and have "negotiations" without Karzai, the writing was on the wall that he was going to hand over the country to the Taliban.
ETA: He has never liked Karzai. I'm trying to remember who he sent over to be a campaign advisor to Karzai's opponent in the last election.
Obama has been blatant not only in his dislike of Karzai but in his wish to remove him from power.
Afghanistan is 90% Sunni and 10% Shia.
When the U.S. invaded it set up the minority Shia to rule the country.
Karzai, the government, the police, and the Afghan military are almost exclusively Shia.
The majority Sunni's hate being ruled by the Shia and will be in open revolt once the U.S. pulls out. ..