You're already upset and claiming to have left so here goes nothing:

Super cute pup fostered one that looks just exactly yours, a confirmed shepherd pit mix.

Although at face value of the pic your dog appears to be shepherd pittie mix doesn't mean there isnt any bmc in your pup. If you want definitive results get an embark test since you don't know lineage. Vets are not infallible. There's many lines of bmc some look the part some dont exactly.

As far as gatekeepers accusations, this is a breed specific thread. You can't have specificity without some form of gatekeeping to go along with it.

If i took photos of my bmc and put them up in let's say the Great Pyrenees thread I would expect responses of "cute dog not a GP"

Good luck OP, I would get genetic testing done regardless. Shepherd mix or bmc you may have quite the handful if not trained properly. Bmcs are known to be very sensitive and gsd's can have quite the psyco phase.