What texts of Vatican II lend themselves to defending Assisi or this reported Fatima incident?
"What texts of Vatican II lend themselves to defending Assisi or this reported Fatima incident?"
You are quite right on this - nothing in the documents themselves justifies this kind of abomination.
The ambiguities in Vatican II that are capable of being interpreted in a heterodox manner, were more symptoms than the cause of the current apostasy.
The "cause" has now moved way beyond Vatican II which is starting to look decidedly conservative to the modernists who want to change the faith.