Nobody is able to make a call on whether the treatment of Meghan was racism, as it was/is a collection of things said and done by so many different people, with numerous different views.
IMO he is highly unlikely to have experience of racism, any more than he has experience of the sort of life lived by the vast majority of people, and he most certainly does not come over as an empathetic soul, but he is not being 'vilified' for that. As he says, he can't help his birth (even though he could work on his arrogance if he felt inclined).
He is out of line not because he is ill informed, but because he did not allow the audience member to speak, shouted over her, insisted that his point of view was right, and behaved disrespectfully.
I'm beginning to wonder if my standards of manners are out of kilter, but I did not bring up my children to behave like this, and would be very disappointed in them if they had.