What's the adjective for sympathist? Here's the word you're looking for.
Included below are past participle and present participle forms for the
verbs sympathize and sympathise which may be used as adjectives within certain contexts.
“I knew Anikei was more sympathetic toward Pavel than anybody else was.”
“He was a sympathetic man who was willing to hear people who had previously been ignored.”
“Because they have cultivated, or had cultivated for them, this image of a sympathetic people, they are terrified of appearing to offend anybody, even if this means losing some of their sovereignty.”