If Jivas are not real, who is talking to whom, here?
In nondual perception, one still identifies forms without habitually labeling or categorising them, and responds appropriately.
A man steeped in dualistic perception due to ego would see the other as a homosexual, christian, French, feminist, socialist and so on, and reacts with prejudiced belief sets corresponding to such labels.
A man steeped in nondual perception would see the other without any labels, and responds intelligently than react out of belief sets.
As stated many times earlier, Advaita deals with experiential understanding and not mere intellectual theorising, as thought cannot achieve holistic perception due to its dualistic structure, where the opposites complement each other, with one leading to the other.
If the real world is not metaphysically true, then there is something outside our perceived universe - which must be metaphysically true. In this other realm, is there an awareness of the existence our world? If so, isn't our world real too?
The enlightened one sees the unitary consciousness pervading the diversity of existence, and takes holistic action based on this perception.
'It is true that God is even in the tiger, but we must not go and face the animal. So it is true that God dwells even in the most wicked, but it does not mean that we should associate with the wicked.' - Sri Ramakrishna