It has to be kept in context. Forget the "morality" aspect for just one second.
In the time of the Old Testament, the dietary laws made sense in order to keep the populace from developing food-borne illness.
Modern science has provided usually reliable methods of dealing with food safety, however science is not 100% foolproof, so orthodox people still follow those laws.
However, modern science still cannot adequately deal with the health and social ills wrought by homosexuality, therefore, and without moral judgements entering into the equation, homosexuality should still be discouraged by the dominant Religions.
As a "moral" matter, I think eating a lobster doesn't rank very high on the sin-o-meter when compared to packin' the fudge.
That seems logical enough - unless Gomorrah was the site of the first Red Lobster franchise... ;-)