Difference between Demonstrators and Protester

DEMONSTRATORS vs PROTESTER: NOUN

Plural form of demonstrator.
A teacher or teacher's assistant who demonstrates the principles that are being taught
Someone who demonstrates an article to a prospective buyer
Someone who participates in a public display of group feeling

One who protests a bill of exchange, or note.
[capitalized] Specifically, in Scottish history, a member of a party which protested against the union of the Royalists with the Presbyterians in 1650. Also spelled Protestor.
One who protests a bill of exchange, etc.
One who protests; one who utters a solemn or formal declaration.
A person who dissents from some established policy
Someone who participates in a public display of group feeling

Participants, Petitioners, Campaigners, People, Rallies, Crowds, Pickets, Demonstrations, Activists, Protests, Rioters, Marchers, Protesters, Sales demonstrator, Protester

Supporter, Tear gas, Militiaman, Demonstration, Picketer, Campaigner, Policeman, Rioter, Activist, Marcher, Contestant, Dissenter, Dissident, Objector, Demonstrator

Monks, Militiamen, Plainclothes, Supporters, Batons, Anarchists, Antiriot, Counterdemonstration, Tear gas, Manifestations, Petitioners, People, Crowds, Rioters, Marchers

Picket, Anarchist, Supporter, Tear gas, Militiaman, Demonstration, Picketer, Campaigner, Policeman, Rioter, Activist, Marcher, Contestant, Dissenter, Dissident

Punch and Judy demonstrators must submit to regulation.
No weekend activities were planned by the demonstrators.
Demonstrators protest school closings on Wednesday in Chicago.
Song demonstrators were fixtures at department stores and music stores across the country, and traveling song demonstrators made circuits of rural areas.
Clashes between security forces and demonstrators, as well as between opposing groups of demonstrators, have taken place.
White nationalist demonstrators hold their ground as they clash with counter demonstrators in Lee Park in Charlottesville, Va.
Cultural Demonstrators Cultural demonstrators can provide unique insights into their cultures.
Alt Right demonstrators walk into Lee park surrounded by counter demonstrators in Charlottesville, Va.
White nationalist demonstrators walk into Emancipation Park surrounded by counter demonstrators in Charlottesville, Va.
PERALTA: The footage shows demonstrators trying to help other demonstrators.

Victory in Detroit Black Lives Matter protester cases!
They tried to say she was a protester.
Police hit a student protester in Letpadan, Myanmar.
US Supreme Court ruling about protester buffer zones.
Another wounded protester later died of his wounds.
Which brings us back to that young protester.
Web site of tax protester Tom Cryer, Esq.
Protester were reportedly fired upon with live ammunition.
Mayor Benjamin reviews video of SC protester held down, arrested Mayor Benjamin, CPD Chief Holbrook release video showing CPD officers subdue protester.
To establish prejudice, a protester is not required to show that, but for the alleged error, the protester would have been awarded the contract.