(a) it’s not about Hitler, but the StaSi/MfS, the East German internal spy agency

(b) it’s not necessarily about Trump – but considering the US has elected Trump, and considering how many freedoms Trump has tried to erase already, what’s if someone worse comes after Trump?

I personally think it's more likely the poster was referring to the stasi.

they were referring to the stasi [0] in east germany. and yes, your leader does have some worrying autocratic tendencies that merit being pointed out ad nauseam (since he's supposed to be the 'leader of the free world' and all that jazz...)

[0] https://en.wikipedia.org/wiki/Stasi