While I posted in a similar vein when the Nokia suit story broke here, it bears repeating. First you cannot judge a patent by it's title, no matter how many you list in sequence. It is the details of the patent, the technology, etc. that are critical, period. So to cry foul based on the title or concept is to demonstrate a very deep lack of understanding of the patent/tort system and pertaining laws, no matter how broken it is.
Second, multitouch has many, many implementations. There is no effective way to carry multitouch specifically into this conversation without being very specific about to which implementation of multitouch you refer. Apple is of course suing on the basis of its very particular implementation of multitouch, derived (most likely, but not definitively) from its acquisition of a smaller multitouch developer company and its patents/IP.
I have not yet seen an opinion expressed in this thread that demonstrates any expertise in patent law or the purported technologies in question under the suit, so all of this is purely speculative and more or less inaccurate, as none of us have the necessary information required to make anything but an uninformed observation.
As for attributing anything like emotions to a large corporation, that's simply anthropmorphising at a ridiculous level, something else I posted on a while back. Apple, Microsoft, HTC, Motorola aren't "scared" of anything. The executives, managers and administrators spend their time directing operations to ensure the ongoing success of the corporation. If it makes business sense to sue another company, based on targeted research into their products and services compared to owned IP or competitive offerings, that's what they do. If it makes business sense to partner with a company that competes with them, they do that too. The corporate business landscape is incredibly complex, and involves a matrix of competing and cooperating relationships that the average person wouldn't and doesn't grasp. Especially as evidenced here.