Politically zealous usage [closed]

Is "politically zealous" an appropriate phrase to negatively describe someone who is obsessed by political ideologies, and who is ideologically crazy such as being a Nazi believer?

If not, how to describe such people?

I dare say that there are many people who are politically zealous but not in the sense of how Nazis were zealous about their evil politics ( mass killing innocent people just because they were Jewish or Polish or Gypsies or mentally/physically challenged, " useless eaters" as the Nazis called the mentally/physically challenged).

The word to describe such a zealous negatively I think is political scourge;

noun

1. (historical)
   a whip used as an instrument of punishment.
   synonyms: whip, horsewhip, lash, strap, birch, switch, bullwhip, rawhide; historical cat-o'-nine-tails;
   "he was beaten with a scourge"

2. a person or thing that causes great trouble or suffering;
   "the scourge of mass unemployment"
   synonyms: affliction, bane, curse, plague, menace, evil, misfortune, burden.

See: https://www.google.com/search?q=scourge&oq=scourge&aqs=chrome..69i57.2515j0j4&sourceid=chrome&es_sm=122&ie=UTF-8

Is "politically zealous" proper to negatively describe someone ... obsessed by some political ideology ...

I would feel fairly comfortable saying that the term, “Politically zealous,” probably evokes, in the minds of many, certain religious and political fanatics who are currently dominating cable news coverage, world-wide and 24/7. So, the short answer to your question is, yes. But that’s a conditional, yes. Conditional, because the definitions of “zealous” and “zeal”---as you can see---carry highly positive, as well as strongly negative, connotations.

ZEALOUS adjective: having or showing zeal.

Synonyms: fervent, ardent, fervid, fanatical, passionate

see, Google.com zealous

ZEAL noun: great energy or enthusiasm in pursuit of a cause or an objective.

Synonyms: passion, ardor, love, fervor, fire, avidity, devotion, enthusiasm

see, Google.com zeal

This last word, however, currently leans predominantly toward the strongly negative, as can be seen by its most common synonyms,

ZEALOT noun: a person who is fanatical and uncompromising in pursuit of their religious, political, or other ideals.

Synonyms: fanatic, enthusiast, extremist, radical, young Turk, diehard, true believer, activist, militant

see, Google.com zealot

Nowadays, if not in the past, to refer to someone as a political or religious "zealot" is definitely to cast them in a negative light and can be considered as a properly negative description.