Personally I think the comment could’ve been worded better as it can be interpreted either as

… is always the excuse for fascism …

(I.E. Fascists use the excuse, provably correct and can be generalised to authoritarianism in general) However I do see that it could potentially be taken the other way as

… is always the excuse for fascism …

(I.E only those who used the excuse are fascists, completely false) I used the principle of charity and assumed the inital argument was logical, though its understandable if others aren’t willing to do that

You seem to have made what’s known as a converse error in your logic:

The person you replied to said that

All fascist ideologies will use the argument of “Protecting the children”

You seem to have mistakingly confused that with the false claim

All arguments that use “Protecting the children” are made by fascist ideologies

And as such you have responded to a statement the commenter never made.

And equivalent mistake would be claim that since every time it rains it is cloudy, therefore whenever it is cloudy it is always raining. Honestly logical errors happen for everyone, I hope this helps.

Pretty much impossible, especially with so many eyes on the project. It is possible to intentionally introduce vulnerabilities into open source code and use that as a backdoor but for projects like tor keeping that hidden for long periods of time is incredibly difficult due to the number of people independently auditing the code.