there's a big overlap between being #nonbinary & being #bi+.
there's also a big overlap in how nonbinary oppression & bi+ oppression work.
you cannot be pro-nonbinary & anti-bi+, and vice versa.
both #exorsexism & #monosexism are based on binaries, on the idea that there are only two valid options someone can be. everyone else just doesn't exist. or we exist but are only "accepted" under very narrow conditions. or that we exist but violence against us doesn't.
one of the most common ways this shows up is what i've called "in between rhetoric": the idea that nonbinary people are in between male & female (and by extension, between cis and trans) & that bi+ people are in between straight & gay. this means people see us as being "in between" privileged and oppressed.
it means that both nonbinary & bi+ people are treated as "the most privileged" group in the trans/queer community, as inherently more harmful, as "less oppressed" than binary trans & gay people, as "wanting to be oppressed so bad" etc. framing us as inherently closer to cis & straight people helps people justify the continued erasure & denial of our lived experience with oppression & violence.
take almost any common exorsexist talking point, switch out a few words & you'll have a common monosexist talking point & vice versa.
this is why as a bi enby, i don't trust you if you fully embrace nonbinary people as trans & as an oppressed group with unique experience, but get weird about bi+ people and our oppression. and vice versa.
it shows me you're really just one step away from throwing the group you claim to support under the bus, too.