No, God does not hate those who enjoy eating shellfish.That has been done away with already.Just like physical circumcision is no longer required.When Jesus arrived, all was fulfilled.He established the new covenant.It is written that those who serve God are no longer literal Jews but spiritual Jews.Those with circumcision of the heart.Jesus teachings say that all that God makes is good and all are to pray for their food,and this is sanctified by God.All can be eaten now,with the exception of blood of course.
Here Paul explains this.
1 Timothy 4:3-5. 3 They forbid people to marry and order them to abstain from certain foods,which God created to be received with thanksgiving by those who believe and who know the truth.4 For everything God created is good, and nothing is to be rejected if it is received with thanksgiving,5 because it is consecrated by the word of God and prayer.
Romans 2:28,29.…28 For he is not a Jew who is one outwardly, nor is circumcision that which is outward in the flesh. 29 But he is a Jew who is one inwardly; and circumcision is that which is of the heart, by the Spirit, not by the letter; and his praise is not from men, but from God.
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Many people who are not familiar with the holy scriptures will jump to the same conclusion you have.They will say God hates people who eat shellfish right? It's a common misconception due to a lack of thorough study.No offense,I am just pointing this out.So we can see that Christians can eat anything they please as along as it is prayed for.Of course Jews still practice circumcision, and still practice Kosher laws, because they do not accept Jesus Christ as the Messiah.But that is another story.