Maybe, but China has already threatened Taiwan with missiles a number of times. The results weren't the intended ones.
And you'll notice that the Big Bad China has never made a move on Taiwan, One, they aren't sure how we will react. Two, don't sell the Taiwanese short as many do. They have a very highly trained military and they are Very motivated. If the mainland attacked,they would quickly find the themselves being put in a defensive position. The taiwanese will be quick to take the fight to them. It will be very costly for the mainland to take on the islanders.