What is going on grammatically with "Xを嫌いになる"?


I've observed native speakers use this construction (similarly with 好き).

Does this mean that なる can be used transitively and take a direct object in
some cases? Is this related to the idea that something becomes liked or
disliked as an involuntary action (and thus "嫌いにする" wouldn't fit)?




It's not なる but 嫌い that is "taking the direct object" (?) in this sentence.
AFAIK なる itself is always intransitive.

嫌い is a common na-adjective which means "dislike" in the form of X **が** 嫌いだ.
See: [Using 嫌い and 嫌う](https://japanese.stackexchange.com/q/29029/5010) and
[私は猫が好き and 猫は私が好き](https://japanese.stackexchange.com/q/17857/5010)

"na-adjective + になる" is a common way to say "become ～".

>   * 元気になる become healthy, recover
>   * きれいになる become beautiful
>

So X **が** 嫌いになる means "to come to dislike X (over time)".

Moreover, X **を** 嫌いになる means almost the same thing as X **が** 嫌いになる. This
phenomenon has been asked about several times on this site, so please read the
followings:

  * [Why are we allowed to use を particle with na-adjectives?](https://japanese.stackexchange.com/q/1841/5010)
  * [Usage of ～を好き outside of embedded clauses](https://japanese.stackexchange.com/q/26005/5010)
  * [Why is を used in this situation? 私は先生がネコを好きだと思います](https://japanese.stackexchange.com/q/4210/5010)

