Since MMY says Krishna is Brahm, he is talking about the formless Krishna or *Krishna Consciousness* or MMY's God Consciousness. Yadava the Krishna is the same as Jesus the Christ or Christos (Annointed one) both had the same consciousness as Krishna and Christ in these contexts represent the *formless* quality of the Unified Field, (which can take any form).
Jesus was a man from Nazareth who achieved his enlightenment from the Diksha given to him by John the Baptist who fully awakened his kunkalini achieving Shiva/Shakti or the state of the Christos (the annointed one). Though Jesus was a illumined Master in a previous life and incarnated as an avatara, every new body must re-awaken it's spiritual powers (kundalini) with each new incarnation, which Jesus accomplished with ease......(the dove above Jesus at his baptism is representative of the two rayed (two wings) Ajna chakra which descended upon Jesus.... Yadava the Krishna was also an historic figure and an avatara similar to Jesus. As such, God takes on the forms of his previous saints and hence you have what are called avataras. When Christ Jesus said, "Me and my Father are one" he was saying that the Brahm or immanent dynamism of creation (the personal God consciousness) and Brahman, the Absolute beyond creation were ONE, or Unified! What MMY calls dynamism and silence. IMHO.