According to that study, 23% approved of the statement "I approve hostile activism to drive change by threatening or committing violence". It's even higher if you only focus on 18-34 year olds.
Full report here: https://www.edelman.com/sites/g/files/aatuss191/files/2025-0...
I imagine that "I support assassination to drive change" would be even less popular.
Except for in Japan? I noticed in all those reports Japan was at or near the bottom of countries measured for trust in their government. I was never able to find polling with regard to sentiment on Shinzo Abe's assassination but the majority of the country opposed the state funeral for him: https://en.wikipedia.org/wiki/Assassination_of_Shinzo_Abe#Re...
I think that had far more to do with it than saving a few yen.
Here's a Japanese article from when the decision was made. Note that the scandal leading to his assassination, which was a significant issue in its own right, isn't even mentioned. That's because the decision to hold a state funeral was itself very scandalous.