When the Lord let down from the heavens the blanket showing all the foods we could eat, pork was among them but I know that a few faiths still believe it is a sin to eat this unclean food. I don't know who to believe or where to find the answer.
Look at 1 Timothy 4:1-5 (KJV) (note verses 4-5):
Paul said that every creature is good if it is received with thanksgiving because it is sanctified by the word of God and prayer.
All Foods are Declared Clean
Disagreement in the Church
Even for non-essential issues, you will always be able to find some Christians who disagree. They cannot both be right, nor does it behoove you to side with one group as if they are always going to be correct. The fact that there will always be divisions among Christians only proves that we are corrupted by sin. You are to follow Jesus alone, not sinful men (like me).
Paul points out that we are each individually accountable to God for our choices, and that we are not necessarily beholden to someone else, as if we should please that person more than we should please God. (Ro 14:5, Col 2:16)
Is There One Answer?
The Protestant philosophy for dealing with this problem is to study the Scriptures yourself (with an open heart, desiring to know the truth, whatever it might be) and arrive at a conclusion that is consistent with the Gospel.
Other groups (e.g. Roman Catholics) might point to official conclusions based on their hierarchical structure of authority.
You are Accountable to God
Recursion: To choose between these two groups or philosophies is the same problem as the one you mentioned. In the end, you are accountable to God alone, so do what you think God wants you to do, and do it with a clear conscience.
Short answer: Yes! You can eat pork as much as you like.
(Pork is my favorite. If I have give up eating pork to become a Christian, I prefer to remain an atheist. This is one of the reason why I am not a Muslim)
There are two types of Christians,
The problem with the Bible is that there are two sets of Testaments and they both are clubbed in a single book. There are many things in the Old Testament which are not related to Christianity. There are also many laws that are obsolete for Christians. The more you read the Old Testament, the more you will be shaped into a a type of Christian who tries to follow the Old Testament laws. For instance, the OT says "Do not eat pork" but the NT says "All foods are clean". They are contradicting each other.
Christians should live by the New Testament. The Bible is useless if you exclude the New Testament. Christianity is based on NT and Judaism is based on OT. Are you a Christian? Follow what the New Testament says. Are you a Jew? Follow what the Old Testament says.
The Old Testament contains -
The New Testament contains -
This is a hotly debated topic. In the law of Moses, the Bible prohibits the Isrealites from eating pork and there is still open debate on whether or not this applies to us today:
And pigs (swine), are specifically warned against here:
One could argue that since we are not living in Israel, this does not apply to us (e.g. the first portion says "Speak to the children of Israel...". Some argue that since we are grafted in through Jesus, they do apply to us. However, some argue that since we are under the New Covenant, this no longer applies to us. There are verses in the New Testament that one can interpret to say that all meat is okay, for example, this passage:
However, if you read the whole chapter, it becomes apparent that this is a vision that illustrated to Paul that he is supposed to preach to the Gentiles. Whether or not it is also saying it is okay for us to eat pork is a point of debate. Many nutritionists, even non-Christian ones claim that pork is unhealthy to eat (e.g. it really is unclean).
If we believe it is sin and we do it anyway, it is sin. I personally am not fully convinced it is okay to eat pork, so I try to avoid pork. However, we can be forgiven for all our sins, just by believing on Jesus for our salvation and asking Him to save us: