Here’s the problem, Cebu, Stanley and Hollingsworth - God has given many other mystics stories and insights into Our Lord’s life which could not, in any way, ever, in ANY sense, be interpreted in a weird way. This is because God is able to communicate perfectly.
The fact that the “poem” has any ambiguousity, unclarity or is “open for interpretation” shows it’s not from God (or, at least, it proves that the TRANSLATION or WRITTEN story of what the mystic saw is not accurate, if we want to assume the mystic did receive a true vision).
God speaks clearly, accurately and without confusion. The “poem” contains confusion, therefore it’s not from God (as it is written).