The KMT is not in power right now because they are pro-one china/unification. If it was just western-filtered copium, the KMT would not keep losing popular elections. The DPP remains in power because it isn’t the KMT.

Your view, as a matter of fact, is mainland-filtered copium. Yes, the rich Taiwanese mainlanders who used to dominate Taiwan politics want a return to the past, but native Taiwanese are more populous and have less vested interest in unification with the mainland do not.