It’s such a difficult subject for me as a white man, the last thing I would want to do is to tell any person of colour how they should feel about it. The problem I find these days, and it’s not just when it comes to race, is how a lot of people are desperate almost to be offended on behalf of someone else.
The best thing that can be done imo is an apology, and removal of the picture from Monchi’s social media. While the intentions might not have been bad, you’re just not going to justify blackface here in the UK in 2023.