hajj is same shoresh as Hebrew hag. So, an appropriate word. Also, notice that Hag usually means traveling to EY, while both Hajj and Umanjj call for people to travel from EY to a foreign place. There are also theological parallels that are probably not appropriate for this site.
It seems that everyone agrees that last year was full of aveiros like a Ukrainian Rimon – breaking the laws in multiple countries, infecting people, creating Hillul Hashem. This year hopefully went better and healthier, but I wonder whether one may associate oneself with an event that acquired such great reputation.