I agree that it is sinful to have sex outside of marriage. Homosexual sex is intrinsically disordered and therefore not the same. It looks like Cardinal Chaput doesn’t want to make it clear that sodomy is a sin that cries out to Heaven.
In general I think folks these days, particularly on the internet, are entirely too eager to ascribe base motives to those whom they dislike or with whom they disagree.
YMMV.