Complex sentence: After the adoption of the unpopular constitution, White had given a speech in Hilo against it, criticizing its exclusion of the Chinese and Japanese from the vote, especially the latter group because of Hawaii's treaty with the Empire of Japan.
Split into simpler sentences: After the adoption of the unpopular constitution, White had given a speech in Hilo speaking out against it. He criticized the exclusion of the Chinese and Japanese from the vote, especially the latter group because of Hawaii's treaty with the Empire of Japan.