You did the right thing, Matthew. Poche was not harmless and he pertinaciously promoted grave errors and heresy and Modernism in general.
Religious indifferentism is no joke; it is not harmless and it is not a trivial matter.
Note that I am not speaking about various looser interpretations of EENS, which the Church has (regrettably) never condemned, but about full-blown religious indifferentism.
Since he refused to explain what his motivations were to post here on CI, I'd wager that he was nothing more than a troll with malicious intent.