Husky, true Hindus consider Krishna to be identical to Vishnu. However, the incarnation of Krishna reaches its end when he gets killed by the arrow of a vanavasi.
What Hare Krishnas (ISKCON) do is to override Vishnu and replace it with Krishna. Things would have been perfectly genuine had they said that worship of Krishna is the supreme form of worship, while acknowledging it as an incarnation of Vishnu. They do a severe damage to Hinduism by twisting this, and then say Krishna is Kristu and hence Kristu is Vishnu too.
What Hare Krishnas (ISKCON) do is to override Vishnu and replace it with Krishna. Things would have been perfectly genuine had they said that worship of Krishna is the supreme form of worship, while acknowledging it as an incarnation of Vishnu. They do a severe damage to Hinduism by twisting this, and then say Krishna is Kristu and hence Kristu is Vishnu too.