Your insurer has to ask certain questions for every claim, and it doesn't matter if you've had previous claims and you think they know the answers to the questions they're asking. Realize that insurance adjusters do a large volume business and I really doubt they remember your details.
You shouldn't take this so personally or be so sensitive about them doing their job. You can't sue them, because this isn't harassment.
PLEASE READ THIS BEFORE YOU COMMENT, EMAIL ME OR PHONE ME. I'm only licensed in CA. This answer doesn't make me your lawyer, and neither do follow-up comments and/or emails and/or phone calls, and you shouldn't expect me to respond to your further questions if you haven't hired me. We need an actual agreement confirmed in writing before any attorney-client relationship is formed. This answer doesn't constitute legal advice, and shouldn't be relied on, since each state has different laws, each situation is fact specific, and it is impossible to evaluate a legal problem without a comprehensive consultation and review of all the facts and documents at issue.