I personally meant 80s, 90s and 00s as my favourite periods, but okay. Let's go with that logic.

The Deutsche Reichsbahn was used to transport Jewish people to concentration camps, and the current Deutsche Bahn is a successor. Should Germans protest trains then?

Actually, matter of fact, Škoda tech was extensively used by the nazis (both Škoda tanks and guns, in fact), so really I can't take the train here in Estonia anymore either, I might catch a Škoda by accident..

For distances outside of bicycle reach, that leaves me Uyghur genocide flavored cars, hypercapitalist corporatocracy flavored cars (South Korea consists of like 3 companies, one of them being Hyundai and Kia), Hirohito cars and buses (some bus services here use Isuzu), or nazi cars and buses. Or I guess Mussolini cars and Trump cars, but who wants anything Italian or American anyway.

If you consider historic ties of different companies to dictatorships that ended 80 years ago, you can honestly be left unable to use any mode of transport other than a bicycle, depending on where you live. Don't get me wrong, I love bicycles, I used to willingly cycle 15 km to gym (and then 15 km back) as a teenager instead of taking the bus. But a lot of the time, bicycles aren't practical, and nearly every car, train or bus company has been at some point connected to some dictatorship.