This isn't entirely true, but insofar as some protest is aimed at intimidation, protest should be aimed at intimidating the government as a whole, not a specific individual, unless perhaps that specific individual is the government as a whole, in which case they'll probably have tanks guarding their palace from unruly protestors and this discussion is moot.
> I'd absolutely support anyone protesting something I agree with
Even in a mob with 500 torches and pitchforks outside your family's house?
> There are no special rights given to "journalists" that aren't already given to all people. Journalists are just regular people and everyone has the freedom of the press.
This is correct in a technical sense but not really correct in a reality sense. Journalists are not privileged with legal rights, but they absolutely have many special social rights. Journalists are given access to places regular people would not be given access to all the time, and people are willing to talk to and divulge information to journalists that they would not be willing to give to random individuals. For an established journalist, it would be trivial to obtain a politician's address even if it were not public record. This social trust is earned by a record of professionalism.
> There are extremely few public servants being assassinated in their homes. There are far more cases of public servants killing innocent people.
The latter statement seems like a non-sequitur. It is true, but not really connected to the topic at hand. Knowing a politician's address doesn't stop them from killing people. It simply results in more total killing in the world, not less. We should strive to reduce all sources of senseless violence, and giving out politician's addresses is absolutely one of those sources.