As I know Isckon devotes make the convince to the people through the help of the Brahma-samhita. And per my research (all vedas/purans/upnisad) I didn't find any valid proof of Brahma-samhita.It's not present in any scriptures. So, why they are trying to guide the people which has no evidence in scriptures.??!!
Now another thing they believe that Lord Narayan(Visnu) has lower quality than Lord Krishna.Lord Narayan is expansion of Lord Krishna.But I never find this type of thing in any Purans/uponisad.
There are 18 purans and each and every are created by sri vyasdev and they are divided in their particular modes.
3 qualities: truth, passion, and indifference.
Sattva (Godness): Vishnu Purana, Bhagavata Purana, Naradeya Purana, Garuda Purana, Padma Purana, Varaha Purana Rajas("passion"): Brahmanda Purana, Brahma Vaivarta Purana, Markandeya Purana, Bhavishya Purana, Vamana Purana, Brahma Purana Tamas ("indifference"): Matsya Purana, Kurma purana, Linga Purana, Shiva Purana, Skanda Purana, Agni Purana
And as we Pure Vaishnav we only accept the Sattva Modes of Scriptures. So my point is that all sattva gun scriptures claimed and sing glories of Lord Narayan as Supreme. Why Iskcon try to misinterpreted the Scriptures to the people. I didn't find any evidence where it said like Lord Narayan is lower quality and he is expansion of Lord Krishna.
Another thing if you said like that he is expansion of Lord Krishna, then you are coming to the Guru-sisya parampara, In your Parampara Naradmuni, vyasdeva and prahalad maharaj comes, but they all are pure devotes of lord Narayan. Naradmuni as per Narad Puran. Vyasdeva is incarnation of lord Vishnu, which evidence is in Visnu-Sahstranam strotram. Prahalad Maharaj is pure devote of lord Vishnu as described in Srimad -Bhagvatam.
And Iskcon's Devotes making fool to people in name of Brahma-samhita, which has no evidence. and also misinterpreted the Scriptures as per their own speculation.
I believe that the Lord Krishna is the Supreme, but Lord Krishna is incarnation of the Lord Narayan, Lord Narayan came as Lord Krishna on the earth, so many scriptures are their which has this evidence. Then why Iskcon making fool to discriminate the Lord Narayan from the Lord Krishna and telling people like different quality and everything. It is not real knowledge ... they convince people on baseless scriptures, spread ignorance in people. Devotion is doesn't exist Where discrimination comes.
So if anyone have some valid information about this then plz share with me.