As the leadership of the Tibetans, the CTA is very concerned of the purity of a Tibetan Buddhist tradition. They will put in a lot of effort and money to protect the lineage. Look at how they protect the Gelug lineage, in order to prevent the lineage from being polluted by Dorje Shugden, they impose a ban, publish books and videos and put official statements on their website. They even have a page dedicated to that.
But why is the CTA not doing the same for Karma Kagyu lineage? The 2 Karmapa issue has divided the Karma Kagyu into 2 groups, none of the 2 Karmapas is allowed to go to Rumtek Monastery because they still cannot decide which is the real Karmapa. Why didn't the CTA step in and decide which is the real Karmapa and allow him to go back to Rumtek Monastery? They did a good job in identifying the real and fake Panchen Lama, they will be able to do the same for the Karmapa.
Again, the CTA has a double standard on religious issues. Is it because they think Gelug lineage is more precious than the Karma Kagyu lineage and other lineages? As the leadership of the Tibetans, the CTA should not show favouritism, they have to protect the lineage, they cannot let the fake Karmapa destroy such a precious lineage. The CTA has to let people know which is the fake Karmapa and which is the real one.