It would indeed be ridiculous if someone had a patent on displaying data in multiple computer windows, but that's not what was patented.

Here's claim #1 -- the other claims are similar in their specificity:

1. A system for synchronizing the presentation of data on a digital computer display, comprising:

first and second window-controlling means, each of said window-controlling means displaying information in at least one display window, a synchronization control means, and means for communications between said synchronization control means and each of said first and second window-controlling means; wherein said first window-controlling means displays first information from a first source, and said second window-controlling means displays second information from a second source; wherein said first information and said second information have sections, and at least one section of said second information corresponds to a section of said first information; wherein said first window-controlling means sends a message to said synchronization control means over said means for communications indicating a change in viewing position to a new section of said first information; wherein said synchronization control means sends a message to said second window-controlling means over said means for communications requesting a change in viewing position to a section of said second information corresponding to said new section of said first information; and wherein said second window-controlling means displays said corresponding section of said second information on at least one display window.

Remember, patents cover methods, not purposes. This patent covers a specific method for displaying data in multiple windows, not the general concept of displaying data in multiple windows.

Mind you, I still think it's a dumb patent. But let's make sure we understand what we're lynching them for before we get out the torches and pitchforks, ok?