“We don’t try to stop goying from doing any of the other sins that they commit.”
Don’t we? If the US was close to passing legislation permitting murder, or kidnapping, wouldn’t we protest? I guess that avodah zara is a lost cause in the face of “freedom of religion”, but if it were a new thing you bet we’d be decrying it. And indeed we were back in the hippie days, when so many of our brethren were nebach lost to Krishn (outright avodah zara).
What sins do we not stop goyim from doing? Eating treif is not an issur for goyim.