I know and am convinced by personal revelation from the Lord Jesus that there is nothing wrong with eating any food. But to the one who considers it to be unclean, it is unacceptable.
So why would you allow anyone to judge you because of what you eat or drink, or insist that you keep the feasts, observe new moon celebrations, or the Sabbath?
You say, “Under grace there are no rules and we’re free to do anything we please.” Not exactly. Because not everything promotes growth in others. Your slogan, “We’re allowed to do anything we choose,” may be true—but not everything causes the spiritual advancement of others.
The one who eats freely shouldn’t judge and look down on the one who eats only vegetables. And the vegetarian must not judge and look down on the one who eats everything. Remember, God has welcomed him and taken him as his partner.
Stop ruining the work of God by insisting on your own opinions about food. You can eat anything you want, but it is wrong to deliberately cause someone to be offended over what you eat.
For the kingdom of God is not a matter of rules about food and drink, but is in the realm of the Holy Spirit, filled with righteousness, peace, and joy.