I think vegetarians might have a quarrel or two with the apostle Paul over who is weak after all it's not easy to be vegetarian at a Texas BBQ joint. Thank God for pickles! Of course vegetarians take a little bit of ribbing in Texas but maybe not the same as in the early church where “you are what you eat” were fighting words. Centuries of animosity between Jew and Gentile did not disappear overnight. If anything the differences that could largely be avoided through segregation were now inescapable. So Paul reminds them that they are no longer defined by their personal piety for they belong to the Lord who welcomes Jew and Gentile alike. That is the part we miss when we elevate one form of piety above another without recognizing that the only question that matters is does it please the Lord. Of course what really pleases the Lord is when we live in harmony with one another which in the end is the highest form of praise.