Yod is an NP, not an NJ. Nuff said, he's not an INFJ.
*facepalm* Even an NJ could regonize that the future cannot always be predicted in a perfect manner, especially if circumstances leave unknown variables that could lead to any sort of possible results. Ni might be able to predict where those results could lead, but they certainly wouldn't have the ability to do so perfectly, nor does it mean they need to be borderline-psychics in order to have Ni.
The jedi philosophy prescribe that it's better to stay away from emotionl attachments, and Yoda is completely at ease with that. INFJs care about communication and harmony, Yoda never makes gloves to speak the truth and say critics in the most straightforward manner.A mark of Thinker. Yoda judge people in an objective way, and don't care about compasion and nurturing, he just says what he thinks with precise words and objectivity.
Yoda place impersonal objectivity above personal subjectivity, then he is a Thinker, not a Feeler.
Yoda is not an INFJ, he's an INTP. CQFD.
You're taking the split between thinker and feeler far too literally; it has nothing to do with actual emotion. F's can be could-hearted pricks in as much as T's can be sentimental cry-babies. The seperation between the two is a matter of making logical judements vs. value judgements, but even a logical person can make a rational choice from emotion, as can a person make a value judement that is callous, cruel, or evil.
And it would follow from the above definition that Yoda is certain Fe due to the fact that his entire value system is roted from the stoic philosophy of the jedi; values of his external group which he asheres to. Which I should mention, isn't any amount of personal subjectivity, but rather is of itself following an impersonal conduct of rules, or in this case, values as to how to live life.
And INTP on the other hand, someone with inferior Fe, wouldn't even consider buying that deeply into such a philosophy without question. In fact an INTP would be far more likely analyze the shit out of such beleifes and sooner question the validity of them as opposed to advocated them as though they were ultimately real. Okay, sure, maybe other types would be capable of the same, but my gut doesn't agree with the idea of an INTP accetping such devote religious beleifs.