From what I gathered at INTPc, most INTP's score 2nd or 3rd highest in type 9 in enneagram tests. There are even a few weird INTPs like me who score highest in type 9, but they are rare compared to the type 5 INTP. Of course, this doesn't explain WHY INTPs are so high in type nine.
Now for some introspection. Why do I hate and avoid conflict? I don't know. It just always seems to make things end up bad no matter what happens. I know I sound like an INFP.