Why is Apple trying to prevent you from bookmarking the Google website?

Safari 4 browser that Apple announced at their Worldwide Developers Conference is perhaps labelled as the fastest browser in the world, with its perfect 100% score on the Acid 3 test. However here is a conspiracy that you will get revealed to when adding the bookmarks manually instead of importing them. Just try to add Google Search. Instead of adding Google to the bookmarks, Safari will pop a weird message on you.
Google is the only search engine Safari does this to. You can add Yahoo Search and Bing without any notices. When you do a search on Google.com, Google gets all the money from those sponsored results on the right side of the page. However, if you do what Safari recommends and do your Google search by using the Safari search field, Apple gets a cut from the revenue generated by those sponsored links. The Google search box built into the FireFox browser I think makes over $100 million a year. However, FireFox doesn’t warn their users when they try to bookmark Google. Just imagine how much they’ll be making if they do what Apple does and tell users to do their searches with the browser search field instead of at Google.com?