Everyone is krishna, Gurus are those who have realized this fact ....
Krishna is to be seen as a title, similar to 'buddha'. One definition for Krishna is vaccum of ego, anyone without ego is krishna.
Yes everyone is Krishna but Krishna is not everyone. The Vaishnava philosophy is oneness and difference. We are all one with Krishna in the sense that a sunshine is one with the sun but at the same time we are different the sunshine can never become the sun.
Guru has realized that he is part and parcel of Krishna. He has realized pure Love for Krishna and has therefore become one with Krishna's Will. The Guru does not merge with Krishna homogeneously.
I disagree with your definition. Krishna is the Supreme Personality of Godhead.
isvarah paramah krsnah sac-cid-ananda-vigrahah
anadir adir govindah sarva-karana-karanam
"There are many personalities possessing the qualities of Bhagavan, but Krsna is the supreme because none can excel Him. He is the Supreme Person, and His body is eternal, full of knowledge and bliss. He is the primeval Lord Govinda and the cause of all causes." (Brahma-samhita 5.1)
I read your link but I think you misinterpreted it.
" The one who has vacuum in himself/herself i.e. the one without ego becomes immensely attractive
like Krishna."