It says in
1 Timothy 4:1-3:
4:1 Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;
2 Speaking lies in hypocrisy; having their conscience seared with a hot iron;
3 Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth.
If God has made something for us to eat, why would He not want us to eat it? That's a good question about the Old Testament though...but it's kinda like how people placed burnt offerings on the altar as sacrifices to God. Do you still see Christians doing that today? No, you don't. This is a really good forum though. We're living in the latter times today, because it is after Jesus rose again.
-Kid