No they aren't. Point me to a law stating that any of those are illegal besides the "revenge porn" example that I outlined.
That's dishonest quoting. The last quote should include my assertion that many of those would be evidence of illegal activity.
If I post the source code of your personal project online
If that was done without permission, if that information was obtained illegally, then that would be illegal. This would indeed be the case with my personal project under its current copyright, licensing terms, and repository disposition. That such a circumstance could be illegal is part of the intended shock value of your extreme example. If you didn't intend such an illegal scenario, it's still reprehensible and extreme. (see below)
If I post the contents of your diary online
Again, if that was done without permission, if that information was obtained illegally, then that would be illegal. Again, if you didn't intend such an illegal scenario, it's still reprehensible and extreme. (see below)
If I post the contents of a heated argument between you and your spouse online
If the contents were recorded from a private conversation in a home here in California, that information was obtained illegally, then that would be illegal. Again, if you didn't intend such an illegal scenario, it's still reprehensible and extreme. (see below)
The following two aren't illegal, but they're just morally reprehensible in a way which even transcends ideology. As such, the following examples are certainly "extreme."
Doxxing: If I post your address online next to a photo of your house
If I post a photoshopped picture of your kid online
But in any case, your position isn't defensible, because you're dishonestly or mistakenly conflating censorship and the principle of Free Speech. They are not equivalent. Again, the issue is the subset of censorship which interferes with Free Speech.
To be fair, there could be scenarios crafted for all of your examples of concerning activity which would make them Free Speech. If the information had a purpose to further the transparency of organizations, public figures, or shed light on legal matters, those would be covered by Free Speech. On the other hand, if the purpose is purely to hurt or humiliate someone for views, then this is reprehensible, and it doesn't fit the purpose of Free Speech.