We as a Buddhist, if we are a real Buddhist, we understand karma. We understand cause and effect.
We know how to practice compassion. We practice skillful means.
In this case, if we hate the Dalai Lama, we create more negative karma that leads to more conflicts and suffering. If we accpet it with an open heart and using a skillful-means-way to deal with it, we don't create bad karma. We create a cause to make peace and show to the world that Dorje Shugden or the practitioner of Dorje Shugden is not evil but good and compassion!
If we hold on the hatred, we will never create peace. With hatred(no peace in our mind), how could we create the cause to lift the ban? (lifting the ban is a peace action)