International Community: Middle-men or Meddle-men?

The Washington Times editorial describes the latest efforts to bolster Mahmoud Abbas as a bad move, citing earlier failed examples:

Since the mid-1990s, for example, the Europeans provided massive financial and political support for Arafat. The United States tried to train a Palestinian police force, only to see many of the police utilize the training to join terrorist militias targeting Israel.

It continues:

It is a disservice to the Palestinians to continue to pretend that failed, bankrupt leaders like Mr. Abbas are part of the solution to their plight. In reality, they are part of the problem.

While we're at it, the impact of having international actors involved in the peace process should be considered.

Would the Israelis and Palestinians be more or less advanced in obtaining peace if there had been no international middle-men?