It really depends on how the conversation unfolds.
Go to the US and ask the same line of questioning and you will probably get “slavery”, then that’s just going to be awkward!
Best pick on something specific, like “where is that accent from”, or "where is that bracelet from”.
The line that when she went too far is when she said “Your people”, which brings up the old colonial past where the brits (and much of the Europeans) treated people from other parts of the world as lesser than. This is when it all gone "oh lady....now that is racist.