DY: “No, I didn’t read it into that sentence. In the previous sentence, though, he writes that “shar issurim” are a “safek gadol” so it’s hard to believe that in the following sentence (your favorite line 🙂 ), he is specifically excluding bishul”
“Clearly, although he (IGM) personally would be mattir, he does not do so in the face of the consensus of the Acharonim. (He is also clearly equating other issurim of maachalei akum with yayin.)”
I’m really confused how you are understanding the Igros Moshe 1:46. What he says is that “other Issurim”, in contrast to wine, are “very doubtful” if there is any prohibition for a Mechalel Shabbos, and he leans to be Mattir.
I don’t know where you see deference to Machmirim on Bishul or milk. I don’t understand why you think favorite line” should exclude Bishul. And I don’t understand why you think he equates Bishul to wine. Please reread the IGM.