Do you think the concept of sjw was hijacked by reddit zombies and you represent the true nature of being a real sjw?
This question is moot, there is no such thing as a "real" SJW. https://yourlogicalfallacyis.com/no-true-scotsmanNeither SJWs nor Redditors are a monolith. Reddit is the fourth most popular site on the web for fuck's sake. By the way, *gasp* I also read and comment on Reddit. TEH HORRORZ!
Is doxxing someone or have him fired through a relentless attack campaign justified if that person does not share your viewpoint?
No, and I would never do that. Once again, redditors are not a monolith, there are millions of different users on Reddit with millions of different worldviews. [SJW] is more of an ironic label that's sprung up, basically, these people 'think' they're fighting for social justice, but in reality they're deliberately searching around for the most tiny insignificant things to complain about and want to micro-manage every aspect of our lives and what we say or do.
Yeah, tiny insignificant things like human rights, pandemic rape, sex slavery, worker exploitation, child exploitation, privacy, consumer protection, government corruption and hypocrisy, and mass corporate deception. 
The words you're looking for, my conservative white male american comrade, aren't
tiny insignificant things
they're, "if it doesn't affect me, it doesn't matter!" Only two types of entities have this logic. Infants and narcissists. 
What you call "tiny insignificant things", I call suffering, compassion, and solidarity, the three pillars of all social progress. And all revolution.