I touched on the subject of not mentioning things a bit in the "The Sabbath" section. While it isn't mentioning it in the comic, this is based on Acts 15. A lot of folks out there will point at Acts 15 to say "The Jerusalem Council settled the issue of the Gentiles. They only have to follow those four commands listed." While there are food related commands mentioned (eating blood, food sacrificed to idols, or things strangled) there is no mention of the clean and unclean, so their defense is that it doesn't apply to Gentiles.
There are two major issues with using Acts 15 in this way. The first is the hypocrisy of using Acts 15 to say that because it doesn't mention certain commands, they are not to be followed, but in the same breath not following the commands that ARE listed in Acts 15. If you have ever used Acts 15 to say you do not follow OT Law because that wasn't given to the Gentiles, when was the last time you checked on the meat you ate to make sure it wasn't strangled? Or that all the blood was drained out? Or that it wasn't sacrificed to a false god? My assumption here is never, because I know in all my years in church, I never once heard a sermon talking about these points. I didn't even start thinking about checking for these things in my food until AFTER I started following God's Laws.
The second is that in verse 21, the Jerusalem Council gives the Gentiles a pamphlet. "For Moses from generations of old has in every city those who preach him, being read in the synagogues every Sabbath.” Homework. These new converts weren't just going to follow four random commands and then just live their lives. They were going to learn from Moses (the Torah, the first 5 books of the Bible) every Sabbath. What do those books teach? God's Laws.
A side point I thought of while writing this. Out of the four commands given in Acts 15, three are food related. Yet, the common Christian mindset when it comes to food is "it doesn't matter what I eat". Food for thought.