Sri Krishna says in the Gita that He is present in all Gods & Godesses so there are many ways to reach Him.I read the same message in the copy of Swami Bhakti Vedanta Prabhupada's translation/explanation of the Gita.All Krishna temples have images of all Gods , Godesses & Saints & the Bhakti Margis too have their Guru Parampara.Why are you limiting it to Bhakti Vedanta ? Why not properly study your tradition first & then preach to others ?