తద్దినం సమయము మరియు నియమాలు

Lord Krishna displays His universal form to Lord Brahma - Krishna is source of all Vishnu murtis

You will not find a single verse in the Bhagavad Gita, which states that Lord Shiva is Supreme. The entire Bhagavad Gita states that Lord Krishna is Supreme. Therefore Srila Vyasadeva, the author of the Bhagavad Gita addresses Lord Krishna as "Bhagavan".

Bhagavad Gita means "the song of God". Everyone knows that Bhagavad Gita was spoken by Lord Krishna and not by Lord Shiva.

Since ISKCON strictly follows Bhagavad Gita, it states that Lord Krishna is Supreme.

Even Shankaracharya, the incarnation of Lord Shiva, has accepted Bhagavad Gita as the highest authoritative scripture and has directed all his followers to worship Lord Krishna.