I mean, it depends on what you mean by "rebellious". There is a lot more nuance than that. From the Kuomingtang's perspective, the CCP are the rebels.
One piece of history is that after Sun Yat-Sen died, his successor Chang Kai Shek purged the Kuomingtang of any socialist, community, and otherwise left-leaning members of their assembly. When some members escaped the purge, this sowed the seeds of the CCP that came to fruit after fighting off the Japanese during WWII.
When the Kuomingtang retreated to Taiwan, it was not run as a republic or a democratic society. Martial law ended in 1987 and a second political party did not appear until it was illegally formed in 1986. The Kuomingtang and its coalition continues to identify with China -- the civilization -- whereas the DDP-lead coalition is done with that and wants their own national identity of Taiwain.
One piece of history is that after Sun Yat-Sen died, his successor Chang Kai Shek purged the Kuomingtang of any socialist, community, and otherwise left-leaning members of their assembly. When some members escaped the purge, this sowed the seeds of the CCP that came to fruit after fighting off the Japanese during WWII.
When the Kuomingtang retreated to Taiwan, it was not run as a republic or a democratic society. Martial law ended in 1987 and a second political party did not appear until it was illegally formed in 1986. The Kuomingtang and its coalition continues to identify with China -- the civilization -- whereas the DDP-lead coalition is done with that and wants their own national identity of Taiwain.