bc folks on the right will weaponize `it` to remove a person's humanity

I sympathize with questioning but this is pretty harsh. The explanation is fairly simple. “It” is how we refer to most inanimate objects and “subhuman” creatures in the English language. Debates on how appropriate it is to be addressed in this way or desire to be addressed in this way aside, it’s certainly not random or a stretch to imagine why some might be uneasy with the idea if they feel it somehow associates the person with the aforementioned categories.

> explicitly removes all identity connotations randomly dehumanization

It's not randomly dehumanization, the neuter gender that the pronoun system preserves has always communicated inanimacy (read: nonhuman-ness) against the masc/fem animate genders. Etymologically, this distinction has been more primitive than the masc/fem distinction. One feature of the neuter gender is the use of the object form in languages that distinguish it from the subject form, hence he/him, she/her, but it/it.

> explicitly removes all identity connotations

Yes, including being a human