I suggest that we focus less on the personal heresy...and more on the indefectibility of the Church.
I have said this countless times over the years, as the REAL issue is and always has been the manifestly counterfeit church
which all good Catholics avoid like the spiritual plague it is, not whether or not the latest Modernist stooge in white is or is not Catholic.
Sadly, most people (whether inside or outside Holy Church) are not very bright and will argue endlessly about meaningless minutiae, never addressing anything close to the central issue of whatever discussion is taking place. How many economic discussions even touch upon the evils of usury, private creation of interest-bearing debt-money, etc?