I am welcome here and valid as a non-binary person, right?

I consider myself transgender, and I've been invalidated by some other trans people who told me that I don't "count" as trans simply because I'm non-binary, despite being trans by

• dictionary definition (identifying with a gender that does not align with my assigned sex at birth)
• experience (social, medical and legal transition, all the stress [including financial] alongside it, and my family being viciously transphobic towards me)
• and self-identification (I consider myself to be trans)

I have to ask because I used to assume that was granted in most trans communities, but after being excluded from many of them and told some transphobic things more harsh than anything cis people have told me even, I remain alert and skeptical whenever I encounter a new online community for trans people (or even queer people period).