The phrase "stop emphasizing" is correct and usable in written English.
You can use it when you want to instruct someone to cease placing importance on a particular point or idea.
Example: "I appreciate your input, but I need you to stop emphasizing the same argument repeatedly."
Alternatives: "cease highlighting" or "quit stressing".
So the memorandum advises that Republicans stop emphasizing a choice between environmental protection and deregulation and instead become "a champion of national parks," the "best way to show our citizens that Republicans can be for something positive in the environment".
A number of Democrats have pressed party officials to stop emphasizing gun control issues, asserting that there are few legislative gains left to be made and that the political cost to the party is too high.
We can stop emphasizing the miracle person's story over the story of the believer who has questions about not getting a miracle.
The US should stop emphasizing the need for Russian cooperation, focus on developing a common front with key allies in Europe and the Middle East, and continue offering to negotiate directly with Tehran.
The ground stop emphasized what officials have been warning for weeks: That the shutdown is having real impacts on the nation's economy, and potentially making Americans less safe.
In recent months, several officers said, many sergeants conducting roll calls have stopped emphasizing the need to stop and question people on the street.
With few exceptions, come-ons from financial institutions — to regular Joes and rich investors alike — stopped emphasizing how measured and trustworthy the banks were.
Asked to explain the recent drop in stops, police officers told The Times that many sergeants conducting roll calls had stopped emphasizing the need to stop and question people on street.
Life insurance became popular only when insurance companies stopped emphasizing it as a good investment and sold it instead as a symbolic commitment by fathers to the future well-being of their families.
He stopped emphasizing that he represented a new incarnation of the governing party, which he called the New PRI to distinguish it from an old party notorious for corruption and economic mismanagement.
As the decades went by, Wohlstetter never stopped emphasizing the importance of being prepared for a surprise attack (his wife, Roberta, had brilliantly chronicled one in a study of Pearl Harbor).
