These bastards always go after the trans people first.
It's not entirely accurate to say that 'fascists always come for the trans people first.' The Nazis, for instance, developed a deeply horrifying eugenics program that didn't single out any one group initially, but targeted any population they deemed 'undesirable.' (Google 'T4 Project' for more info.) Among the first victims were people with conditions we now understand as autism. In fact, the term 'Asperger's syndrome' came from Hans Asperger, a clinician working in Nazi-occupied Vienna who labeled some autistic children as his 'little professors.' These were children he deemed could contribute to society and were thus worth saving. This is one reason why many in the autistic community prefer not to use the term 'Asperger's' anymore—it's just ASD (Autism Spectrum Disorder) now. If you read the book 'Neurotribes,' it provides an in-depth exploration of how the Nazis manipulated narratives of 'mercy' and 'alleviation of suffering' to justify their genocidal acts, starting with what they euphemistically referred to as 'euthanasia' of disabled children. LGBTQ+ individuals, including those we would now identify as trans, were also heavily persecuted, often being wrongfully categorized as 'mentally ill.' But these atrocities were widespread and multifaceted, targeting numerous groups concurrently, not sequentially.
I mean, if we're bringing up specific examples of targeted groups, it's a demonstrable fact that yes, the queer community in Germany was targeted in the very very early years of Nazi rule. Yes, Aktion T4 was horrifying, but as you mention there are so many groups they targeted, saying "what about these people?" only serves to distract from specific echos of history people should be calling out today.