I don't care about the specific politics, and I don't know his biography. You can love this man and hate China with the power of every cell in your body. But calling anyone a martyr, even with poetic license, has very specific connotations which don't seem to apply here.
https://dictionary.cambridge.org/dictionary/english/martyr
> a person who suffers very much or is killed because of their religious or political beliefs, and is often admired because of it
https://www.merriam-webster.com/dictionary/martyr
> 2: a person who sacrifices something of great value and especially life itself for the sake of principle
No, that wouldn't make me happy. A world without suffering and oppression would make me happy, but failing that, lets at least try to use words appropriately.