I'm saying that the DPP is primarily responsible for destabilizing cross-Strait relations. I'm really not sure why you're arguing with this: it's the same reasoning used to justify the attempts to overthrow Castro in Cuba as well as the actual coups of multiple South American countries. They became ideologically unaligned with a global superpower and had to go. Geopolitics has not tangibly changed since then, except for China supplanting the ex-USSR as the "big bad" in the West.
The fact that there's been no KMT coup, despite KMT officials basically controlling the entire military, is a testament to the restraint of all parties.