The reaction is because people thought it likely that you were a spammer, and nobody likes spammers.

Even your more detailed response says that you're basically screen scraping to set up a man in the middle attack. Particularly with the DNS issues that are out there, Google has to be worried about blocking man in the middle attacks. So if you got your script working, it won't necessarily just be accidental changes that break your script.

Which means that, indeed, contacting Google is the right thing to do.