One newspaper article that claimed red songs had helped heal the mentally ill (in Chinese) seemed like a step too far and excited the ire of critics.

报刊上一篇声称红歌有助于治愈精神病的文章看起来太出格了，并且引发了批评潮。

youdao

"And that impacts political relations at some point. Accepting Turkish leadership is just one step too far."

VOA: standard.2010.07.26

Will he, like so many chief executives before him, take his cost-cutting measures one step too far?

FORBES: Can Apple Survive Without Steve Jobs?

The idea of surreptitious, constantly available recording appears to be that one step too far that forces reevaluation.

FORBES: Google Glass Won't Be Allowed in Strip Clubs

This is one step too far.

BBC: School safety 'insult' to Pullman