As strange as it sounds, I think it actually is a compliment in most cases if an INFJ does think that it is worth trying to have conflict. On the rare occasions where I've done it, it nearly always has resulted in a much closer relationship after and fewer problems. I did this with a boss/coworker once and we have remained very good friends to this day in a way that we wouldn't have been had it not happened. It feels very unnatural to me though. I would more likely play out the possible scenario in my head and decide it just wasn't worth it because of the way that I thought the other person would respond, the unlikelihood of coming to resolution, or ensuing emotional load that I would need to deal with after the fact. I think sometimes that's what bugs people about INFJs. They maybe feel like we write them off too easily or that we just abandon them if they don't do what we want them to.
Perhaps I should have said it here instead of via rep, but I think it's important to make the distinction between an emotional outburst of anger and someone expressing that there is danger ahead. INFJs really don't like to not be in control of their emotions and in particularly don't like to be publicly not in control of their emotions. In my opinion, it would be unlikely to see an INFJ go off on you unless they felt it was preventing something worse from happening.