Surprisingly, 5k races may happen in multiple places: https://www.instagram.com/reel/DYM64Boqt9K/

Nope [1], they actually hosted a 5k in Gaza. Can you imagine Holocaust survivors or Armenians during the genocide taking part in a 5k? I can't.

Also, it is definitely not "by any modern definition" a genocide. Ireland is currently trying to broaden the definition of the term just to indict Israel [2]

[1] https://ca.news.yahoo.com/palestine-marathon-returns-gaza-we...

[2] https://www.israelnationalnews.com/news/409187