I am not sure that Biden was there in Afghanistan when the bomb was detonated. To say that he is responsible is certainly politically motivated and unjust. The real issue is why was America there in the first place? Was it set up to make a Republican politician and their family and friends rich, at the expense of the American people and tax payer, who are being asked to accept lower government services so that the politician and get rich?
One of the things that the Democrats in the USA did while Trump was president was do every thing that they could to make him look bad, (I am not saying he was an Angel) and now the Republicans can do everything they can to make Biden look bad. The Dems opened the door for the GOP’ers to get even.