I guess it was the high point of both civilizations so they might not have anything else worth fighting about

Start teaching history in school. And, geography for that matter.

Nationalists misappropriating and manipulating Culture, to create an "identity" based on lines on a map.

Start teaching history in school. And, geography for that matter.

What?!? Are you suggesting to teach the Thais that the majority of their "high culture" originated from Cambodia which in turn derived it from India? But that might require reading the seminal tome by George Coedes, "The Indianized States of South-East Asia", a somewhat daunting read best left to serious students of history when they are still young. And teaching Thai students something other than the hagiographies in the Thai chronicles (พงศาวดาร) has as much chance of popular approval as allowing unfettered archeological research in Japan.

It's Preah Veanar all over again,.... bunch of losers Smileland

a lot of asian countries have these dances so how does Cambodia believe it is there countries alone and no other should do it

"Thailand is requesting for the World Heritage listing of Thai food, Thai boxing, Norah dancing and Khon respectively."

Thai food, boxing, and (I guess, no expert) Khon dancing are similar to and probably derived from the older Khmer versions, after all Khmer culture pre-dates Thai by a long time.

So a better question might be, why does Thailand think it can call this stuff Thai and only Thai?

And there's no indication in the article that Cambodia's purpose is "no other should do it" as you write.

I hear a lot of prejudiced anti-Cambodian sentiment among Thai expats (influenced by their "hosts"), few have ever spent any time in Cambodia (visa runs don't count) or know much if anything about the history. Is that the case here?

https://www.theguardian.com/world/2016/jun/11/lost-city-medieval-discovered-hidden-beneath-cambodian-jungle

Khmer Angkor culture was even more developed than previously known. At the time this civilisation had the world's biggest city (and was producing traditional arts of the highest caliber, including, no doubt, Khol dance) the Thais were still migrating down from the north. Bolsters the Cambodians' case.