yes. there is a promise by Him in the B.Gita and other authentic shastras that He accepts and reciprocates the devotion of all His devotees either Radha or Shiva or any other. Krishna as a devotee of Radha, however never reaches the level of Her devotion. Radha is considered to be at the top most level of devotion and servitude. Nevertheless, in the seventh canto of Srimad Bhagavatam, He Himself says that His (marginal) devotees like Prahlad are more dear to Him than His transcendental and eternal devotees like Radha (His own soul) and Shiva (the topmost Vaishnava, the Rudra). There are infinite trillion universes. all of them have one brahma, one vishnu, one shiva. at this level of eternity all of them have equal importance in their respective universe. This is what srimad Bhagvat Mahapuran has to say about krishna!! Guru nanak devji says in japji saheb, "eka mayi jagat vyaayi teen chele parvan; ek sansari ek bhandari, ek laye divan." Gosvami Tuslipandit says in ayodhya-kand thru the Valmiki-Ram samvad, "jag pekhan tum dekhanihare, hari-bidhi-sambhu nachavanihare." In the Bhagvatam tenth skand (canto) lord bramha visited dwarkadheesh where krishna resided expanding Himself with all His 16,108 wives. For the enlightenment of lord brahma krishna manifested before him all the brahmas of all the other universes. Our universe has brahma who has four heads and our lord shiva has five heads. other universes have differently headed lord brahmas and lord shivas. the c.c.(chaitanya charitamrit, madhya-lila, specially ch#20) by sril krishnadas kaviraj has all the answers. lord shiva and lord vishnu have least difference in divinity at mundane level. sri brahma smahita says that if vishnu is the divine milk then shiva is a divine yogurt. they are supplementing each other at this level of divinity. vishnu is a divine medium which Krishna uses for different avatars for limited mundane pastimes, however, Krishna Himself is an avataree and not an avatar. All the three types of vishnus/mahavishnus (kaaran, garbhas, kshiras) are the expansions or purushavataras of Krishna. During His different incarnations He takes use of His own expansions to descend to the mundane pastimes from eternal pastimes. If we study the C.C. we will accept this divine truth. there would be no room for sectarianism left on our material minds. yes. the c.c. is all about convincing and concluding the spiritual knowledge which we have acquired reading different scripture.