Do you think there will ever be another guy like Hitler in the sense that everybody would team up to take this guy out

I would hope that the situation would not turn into another series of events as occurred with Hitler. There are dictators and genocide in the world, but not to the same degree as the power and destruction that Hitler amassed.

On the same scale ?
No.
But genocide and mass murder of innocents still occurs in the world.

If there is, i hope so; and i hope PRESIDENT Trump is at the forefront!