What surprises me is that she cares so much about what's going on in America yet she's an Austrian living in Japan. What the hell does it matter to her?

That is probably the worse part, she went to Japan, not even an American and yet she still whine about American, Brazil, Poland politics.

What are all those Japanese ones all about? I also noticed that she has BLM and George Flloyd hashtags on there.

You can try copying the text and paste it into deepl. But basically in the main tweet she was complaining that there is not enough news coverage from the Japanese media about Floyd and then accuse them of siding with Trump (reminding me of "silence is violence"). The rest is her arguing with her Japanese fan about it.