"No, the taking of innocent human life is so heinous, so horribly evil, and so absolutely opposite to the law of Almighty God that abortion must take precedence over every other issue. I repeat. It is the single most important issue confronting not only Catholics, but the entire electorate."
That's rank heresy, but his violation of the canons relating to his episcopal jurisdiction should be enough. The man should be silenced, deposed and sent to a monastery.
The letter you were quoting from A PASTORAL LETTER FROM BISHOP MARTINO is addressed to the faithful of his diocese.
I think you need to admit that nothing in the letter violates any canon or proclaims any heresy even by the Easter Orthodox standards, were they to apply to bp. Martino.