I'm starting to paint a picture of what you are as person, and I commend you as a good person for sticking to your principles and morals. However I don't think scolding people here about being unethical or immoral is going to change the situation on the ground, and the reason why these wars happen in the first place. For this case, US have been openly shown to be aggressive against Russia, forming alliances and plotting to bring down Russia. Ukraine just seems like the final straw for Putin, and for him it has turned into an existential struggle to keep his country's sovereignty and security. His goals for Ukraine, is only one part of the battle, remember before the war, he kept asking for NATO to revert their expansion, and to create a new security framework with EU. When he became the president of Russia, he at first were very cordial and diplomatic with the west, willing to give concessions and such to foster a cooperative environment. But after a decade of trying, it seems like the West just outright wants to destroy Russia, harvest their resources, and subjugate their people.
As for the Taiwan situation, it only became more of a problem for the CPC lately, because of the US wanting to use it as a leverage and maybe a future staging ground for their operation. This is compounded by the current administration in Taiwan, becoming more open about their intention for independence than their predecessor. I'm sure the CPC prefers the status quo from before, and would want reunification based on a modified version of "two systems, one country" used on HK. But now seeing how things have changed, those options might not seem available to them now. Its not even in China's best interest to rule over a population of Taiwan, who would be rabidly hostile to their rule, so military reunification is the last thing they want.
I personally want a peaceful reunification, and I have thought about how to do a "technical reunification" with respect to their autonomy and still be able to satisfy China's security and political needs. I will get around writing it down some day, and post it in the Taiwan strategy thread.