I do not think Westalis or WISE are ideologically pure as a lot of people seem to believe they are.
I was rewatching S3 today since I got sick, and Spy x Family is my comfort show, and I found it interesting about the anti-Ostanian propaganda and beliefs regarding Ostanians, namely that they are all 'demons who have horns' (paraphrasing, obviously). This is really interesting, because it actively dehumanises their enemy. Literally, they're not humans - they're monsters. This is interesting to me, since this was a tactic used by the Nazis regarding Jews, but I think this is largely coincidental and not intended by Endo. Or, perhaps it was. Either way, it's a point to pick up on.
Conversely, we never hear that sort of sentiment from the Ostanian soldier Franky, who states that the propaganda they were fed were that the West broke the treaty and did a false flag operations. None of these dehumanise Westalians. It's not TRUE, but he's not staying "you guys are cockroaches".
Now, we know that not everyone in the West shares this 'all Ostanians are demons'. Namely, Twlight's dad chastises his son for saying these xenophobic things, so we know Loid didn't hear them at home. So, the belief must be prevalent enough - on the radio, on TV, in society, at school, that baby [redacted] feels comfortable enough regurgitating these talking points without fearing consequences. If anything, it seems he's more rewarded for this behaviour and thinking by his fellow Westalians at large (with the exception of his father and the croquette lady).
This sort of propaganda doesn't just happen and become normalised in a short timeframe. These are incredibly ingrained beliefs in Westalian society; children often reflect the society they grow up in. It is entirely possible WISE - as an intelligence agency - played some part in this, but there's no way to confirm. You know, because that's not how spies work.
However, I noticed a lot in fanworks that WISE and the West is always presented as the good guy and morally superior to Ostania. It makes sense; we follow an employee of WISE as a protagonist, and he's a nice enough man, plus he's attractive, so we obviously support him, since we're invested in his personal struggles. However, we don't actually see too much of WISE (they're a branch of central intelligence services). Either way, lot of people overlook the blatant propaganda I mentioned before.
Everyone who works there seems to be super cool, obviously, but there's a misconception in fanon that because we like Loid and Handler and Nightfall, that WISE is good, and therefore, all their actions are good. However, WISE is a government institution, and seems operationally similar to the NSA/CIA (and uh, yeah, those guys are NOT good). In the Fionky episode (S3E1), some things of note stuck out to me.
They accused - pretty bluntly - an Ostanian politician 'illegally blocking' strawberry exports. How the hell did they arrive at that conclusion? I'm willing to put this down as weak writing, since Endo does not focus on the politics, but that guy has to be beholden to someone. He can't just be like "no strawberries for those guys" without at least 50+ politicians appearing and shouting "you fucking donkey". For the purpose of this, I'll say this was WISE being given an official pretext for the operation to commence. That is not the same as this actually beng the case.
That operation was effectively demanded by a Westalian politician, who it's basically intimated would kick the fuck off for war if he didn't have Ostanian strawberries on his birthday cake in two weeks. What sort of politician has that much sway over an intelligence agency? Who is this guy? Why can WISE just get ordered around by a single person in power? That is NOT how checks and balances work.
From this, I basically concluded that WISE effectively just runs personal favours for their homeland politicians. Sure, they must keep the balance of peace between east and west, but they seem to basically immediately kowtow to any unreasonable demand. It really seems that political corruption runs deep in the West (probably to an equal degree as it occurs in Ostania).
I don't really know where I'm going with this. I'll likely try and write WISE more neutrally, since I don't really buy they're a 'save the world' agency. That's just what Anya thinks about WISE, because she looks up to Loid. Her view is incredibly skewed, and can't be taken as the full truth. Even Handler snaps at the WISE rookie about that sort of thinking (with the understanding he's not four years old, obviously). So, I think going forward, I'll try and write WISE with this nuanced approach more often.