Biden and the Democratic Party understand the importance and operation of Democracy and will work to protect this form of government because it is constructed to work for all Americans.
The Republicans had two choices to make recently so the party could survive. One choice is to widen their party ideals to include minorities and become a bit more liberal. The second choice is to still retain their current values but cheat to retain power. They decided to cheat.
The individual Afghan soldier seems to have realized that no one had his back. He was not getting normal expected support for his own existence and efforts.