Ironically this slur is only ever used by imperialists who support the empire they live under.
If we were having this argument inside the Soviet Union in 1968 you'd be calling me different slurs for an identical reason - because I wouldnt have supported sending the tanks into czechoslovakia. and you would, coz your calculus is "my empire justified, other empire unjustified".
This isnt any different to when I was called a Tankie in 2003 coz I didnt want to send the tanks in to Baghdad by people who accused me of being pro Saddam.
You apparently dont have the capacity to see pacifism, only traitors.