Motivations can be transparent. Careful.
Careful of what? Being judged by an anti-Catholic bigot?
While you are certainly spot on with your assessment, I fear you cast pearls before swine, my friend.
When I have encountered this kind of hostile attitude in the past regarding Calvinism it’s been mainly because of that little inconvenient and discomforting sovereignty of God and predestination thing the Reformers taught. Of course even the mere mention of total depravity sends some over the edge, especially when they think they are a “good person” and can save themselves by works and adherence to the traditions of men.