I'm not gonna lie, sometimes it sucks to be an INTP member of an INFJ forum. Fe and Ti simply do not get along very well. Members with Fe seek to harmonize with their fellow member and are sensitive to their sensibilities. By contrast, Ti members are more interested in finding and expressing the truth, and if that offends someone, then tough cookies.
There really isn't much that can be done to compromise between these judging functions and the battle is even internal.
An INFJ who is pissed at an INTP for how they expressed their views will often be torn between the Fe sentiment of how insensitive the INTP was being and the Ti sentiment of the truth of INTP's argument. The end result is the INFJ will usually say that the INTP is right or at least entitled to their perspective, but they need to be nicer about it.
By contrast the INTP who is pissed at an INFJ for their sensibilities will often be torn between the Ti sentiment of expressing what they believe is the truth and the Fe sentiment of feeling bad when they do hurt someone's feelings. The end result is the INTP will usually say that the INFJ's views should still be respected even if they aren't rational but the INFJ needs to be less sensitive.
So you end up with this assumption, both internal and external, that INTPs need to be "nicer" and INFJs need to be "less sensitive". When in actuality, the priority of the INTP is to find truth and the priority of the INFJ is to harmonize. INTPs value competence and INFJs value peace.
If an INTP senses that someone holds a belief that is false and potentially harmful, then that is incompetence and the INTP is driven at all costs to address it, even attack it. Incompetence and ignorance are the mortal enemies of INTPs and the perceived cause of all evil. The more the INFJ chooses to protect the belief, the more caustic and emotional the INTP is likely to get in trying to destroy it. The INTP usually isn't interested in attacking the individual who holds the belief, only the belief itself, but INFJs are often very attached to their beliefs.
Given this pattern of interaction, what course of action can the INTP and INFJ take? Obviously, by their very nature,, INTPs are not going to back down when they encounter a potentially dangerous or irrational belief. And by their very nature, INFJs are not going to back down when they feel their views must be respected even if they aren't based on rational or evidence.
Can the two types compromise in this situation, or is it hopeless?