I don't understand why you're upset. This doesn't effect your existing policy in the slightest, they're just changing their customer base is all. To be fair that's how they used to be, competition car specific, until they started branching out. Just because they want to change their demographic doesn't mean that it effects you at all, just take your business elsewhere.
It happens a lot right now, especially amongst Elise owners who are finding that, upon renewal, their insurer won't even offer a quote.