@Loken Short version, yes.
A normie is someone who just goes along whatever is the current mainstream cultural and political trend. They lack the imagination to think that anything could be different, living in the present, looking neither to the past or the future.
For example, in regards to LGBT, a normie would put pronouns and/or the rainbow flag in their bio – Even if they’re not gay, transgender or even a true believer in the political ideology – They’re just doing it because it’s part of the larger cultural zeitgeist and want to prove that they’re a “good person” and they very likely live a nuclear family lifestyle. What they don’t realize what they’re doing is essentially marking themselves as Leftists (even when they’re not) and the more anti-social right-wingers are unable to restrain themselves and start hurling insults at them, therefore reinforcing the view that the Left must be “good” while the Right is “evil.” (It’s kind of a brilliant tactic on the Left’s part, actually).
If we lived in some sort of alternate timeline where the Axis powers won WWII and homosexuality likely remained criminalized – I’m pretty certain most normies would just go along with that. Human beings are essentially pack animals; it’s innate for us to have the approval of others for survival, so most people don’t dare to stand out in some way.
The term emerged out of 4chan because 4chan is made up of raging autists and social outcasts who do long for group approval but don’t want to compromise their individual integrity, so they’ve become pariah’s anyway for their opinions. That’s why the term is generally attached with connotations of disdain: Normies don’t hold any opinions that aren’t already approved by every mainstream institution and will be quick to ostracize anyone who does.