How disappointing. Not even the slightest bit of intellectual curiosity. Guess we Christians are so far beneath you, only deserving derision and mockery.
So fine...
Levitical law was intended by God to separate the Hebrews from the other pagan civilizations surrounding them. This is important both as a lifestyle for those people but also as a foreshadowing of those saved by God's grace now - we are set aside and our behaviors are different than the world around us.
The behaviors prohibited in Levitical law generally held religious meaning to the pagan cultures in the region. The laws against food preparation styles (cooking a calf in it's mother's milk for example) were not merely arbitrary rules, but prohibitions against the rituals of the other cultures. These rituals were mea6 to curry favor with polytheistic idols and being about fertility, crops, favorable weather, blight against ones enemies, etc. This had no place in Jewish life.
Now that the concept of God's Chosen People has shifted thanks to the sacrifice paid by Jesus Christ, these laws are no longer applicable. Just as we do not make animal sacrifices to God as a substitutionary atonement for our sin, the intent of these other laws has been fulfilled. The laws of Moses, being moral laws, are still very much applicable. Jesus Christ says so Himself.
The present day notion of wearing a Dri-Fit t-shirt carries no pagan ritualistic meaning.
The way food is prepared generally carries no ritualistic meaning. Even if it did, God tells us through the letters of John that consuming food prepared as a ritual is not sinful so long as we do not believe in the ritual. It is not sinful for me to eat Kosher or Halal food because that means nothing to me spiritually as a Christian.