So as I hope you all know, the Hajj is a religious pilgrimage that Islam requests all its believers to participate in at least once in their lifetime if possible.
Now I know that there have been many incidents such as stampedes where lots of people have died during the Hajj, but this applies to everybody no matter their ethnic origins. It's just hard to maintain perfect safety with so many millions of people.
But I have also heard or read of Western "tourists" getting into trouble there. Of course non Muslims are not allowed to go to participate in the Hajj, to go to Mecca at all, and it's very difficult for them even to get into the country. But people have done it anyway and I recall the story of a German man in disguise in a woman's burqa that the crowd found out to be a non-Muslim and killed him.
This makes me think it would not be easy to be somebody obviously from a part of the word not majority Muslim in the midst of the crowd there. But there are very many people who have converted to Islam all over the word and they are still of course asked to participate in the Hajj in their lifetime too.
But is it safe to be a "westerner" at the Hajj even if you're a devout Muslim? Have their been incidents? Should you try to look "as Muslim as possible"? How should a Muslim (by conversion) who is from a Christian (etc) country try to dress, act, and behave to make the pilgrimage as safe as possible?
4. that I couldn't fit in my previous comment is that I Googled for a reference to the story of the German tourist killed for being a non muslim and couldn't find anything, so it could well be apocryphal ... or it could just be too old and obscure to be easily found on the net.