Unclean Foods of the Bible

Are the unclean food laws strictly for the Jews?
Did Isaiah 66 err in stating that those eating unclean foods will be destroyed at the second coming?
If Jesus sanctioned eating unclean foods during His ministry, why did Peter refuse to eat it during his vision in Acts 10?
Is unclean food the only abomination from the Old Testament that is now allowed today?
Did the physiological makeup of the pig's one stomach change at Calvary?
Why did Paul write the equivalent of an epistle to the Gentiles trying to convince them to continue eating what they were accustomed to eating?
Find the answer to these questions and more as you read what the Bible says regarding this issue that is not only of health, but of salvation.