For things to move forward, both sides, and some people hate when you just say the word both sides, well, both sides in this case, all sides, have extremists that are going to make peace very difficult.
Para que las cosas avancen, ambas partesy algunas personas odian que se diga la palabra "ambas partes" ambas partes en este caso, todas las partes, tienen extremistas que van a hacer que la paz sea muy difícil.