Such relics are very highly likely to be an historical artifact of nothing more than early tourism promotion. The priesthood wanted to get their share and charged money to see it, whatever it was, possibly a finger bone supposedly from this or that saint, a piece of wood purportedly from the cross was a biggie. There’s an element of PT Barnum to it all that I find offensive, myself. However, there’s the passing chance that at least some small amount of it isn’t flimflam and might actually be a genuine historical artifact of something other than early tourism promotion, and for that reason alone I’m not entirely personally dismissive. History should be preserved and remembered, even if there are a lot of counterfeits floating around.
I would agree. It's when people build large churches housing an artifact that causes people to kneel and pray that is more problematic. There is a difference between a museum and a church.