I'd like to do some kind of activities that would motivate Japanese who are not interested in politics.
この場合、次のような言い方ができますよ。
ーI'd like to do some kind of activities that would motivate Japanese who are not interested in politics to become more interested in it.
「政治に興味のない日本人が興味を持つように動かすなんらかの活動がしたい」
ここの「動かす」は to motivate「動機を与える」を使って言うと良いでしょう。
Japanese who are not interested in politics で「政治に興味のない日本人」
ご参考まで！
カナダ 
