Also, it was stated that because of the disadvantages faced by the negative extraterrestrials, one request to the right positive forces will eliminate negativity, as a last resort necessary for our liberation. Is there any truth to this?

In a sense, people have this power if they call on the divine. They cannot bring this about directly themselves. The declaration will only be effective if it is asked of the divine realm and not some other source of energy. And so the description is given with some inner brake applied in the implication they may be causing harm, and this will leave people in a state of uncertainty and some confusion. When do you bring down the hammer or when do you not? People are not in a position typically themselves to know where and when heavy-handed intrusive energy is needed and where it may not be. So this is more hand-waving and not helpful. There needs to be a broad-based request for all dark beings to be dealt with in an effective manner to remove their suppression and subjugation of humanity. That is what is needed. That is what needs to be requested by each and every human again and again and again and again. That is not hard to do, is not an onerous burden we place on humans, it is one that they can easily do with effectiveness if they wake up and hear the message and embrace it and trust it will be so. They need to believe, but that is true of all solutions when you think about it. Unless they are picking up a weapon themselves personally, they are putting their trust in someone or something to do it for them. Why not trust in the divine realm and have the faith and belief once again that will be done, and is their birthright, and is the highest source of power available in the universe? You can not really do any better, but must believe, and also must know this is not only an option but a requirement for your future survival. That is plenty incentive enough to see to things if people understand this.