[enriquto]

In that case using the correct word would render the title unambiguous and comprehensible to everybody. As it is written I read it as "who was responsible for the act known as the Maya Sacrifice?". As a non-native English speaker who learnt the language in a rather formal way, interpreting the word "sacrifice" as a verb is ungrammatical to me.

[brianush1]

In this case, it would be "Who did the Mayan Sacrifice?" instead of "Who did the Maya sacrifice?" The lowercase "s" indicates it is not part of a proper noun, and "Maya" is a Native American group, and must be suffixed with an "n" to act as an adjective.

[mkl]

I think "sacrifice" is used as a verb at least as frequently as a noun. To me it's unambiguously a verb here as "Maya" is a noun ("Mayan" is the adjective).

[DanBC]

Anybody using English[1] will benefit from a good dictionary. All dictionaries show both noun and verb usage.

https://www.etymonline.com/word/Sacrifice

[1] I do mean anybody: people with or without English as a first language.

[qwsxyh]

As a native speaker, sacrifice is a verb.

[enriquto]

It can be a noun or a verb, depending on the context [0]. In this sentence it seems to be a noun, which is qualified by the adjective "mayan", written simply as a noun in apposition "Maya". If "sacrifice" is a verb, the sentence has no object, thus it is ungrammatical, because "who" cannot be the object, only the subject. Or so I was told when learning this damn language!

[0] https://en.m.wiktionary.org/wiki/sacrifice