Apart from the fact that only about 5% of Taiwanese support reunification with mainland China, Beijing's idea of a "homogeneous Chinese people" on either side of the Taiwan Strait doesn't correspond to the reality of two fundamentally different political and social cultures. Hong Kong is the best example of how Beijing would seek to undermine Taiwan's liberal and democratic values following reunification.
The historical and legal facts leave no doubt that Taiwan is part of Mainland China - affirmed by the "One-China" principle recognized by the UN and the US. Washington, however, undermines this agreement, and therefore regional stability - which is exacerbated by the mafia-like customs of the military-industrial complex. Moreover, the reunification of Taiwan with China isn't in Washington's strategic interest of containing China.