No, your confederate flag does not make you a racist...
But your dogmatic adherence to it does make you unloving...
"Therefore, let us no longer pass judgment on one another, but rather
decide this: not to place a cause for stumbling or a temptation before a
brother. I know and am convinced in the Lord Jesus that nothing is
unclean of itself, except to the one who considers something to be
unclean; to that person it is unclean. For if because of food, your
brother is grieved, you are no longer living according to love. Do not
destroy by your food that person for whom Christ died. Therefore do not
let your good be slandered. For the kingdom of God is not eating and
drinking, but righteousness and peace and joy in the Holy Spirit. For
the one who serves Christ in this way is well-pleasing to God and
approved by people.
So then, let us pursue what promotes peace
and what edifies one another. Do not destroy the work of God on account
of food. All things are clean, but it is wrong for the person who eats
and stumbles in the process. It is good not to eat meat or to drink wine
or to do anything by which your brother stumbles or is offended or is
weakened. The faith that you have, have with respect to yourself before
God. Blessed is the one who does not pass judgment on himself by what he
approves. But the one who doubts is condemned if he eats, because he
does not do so from faith, and everything that is not from faith is
sin." Romans 14
"But this knowledge is not in everyone. But some, being accustomed until now to the idol, eat this food as food sacrificed to idols, and their conscience, because it is weak, is defiled. But food does not bring us close to God. For neither if we eat do we have more, nor if we do not eat do we lack. But watch out lest somehow this right of yours becomes a cause for stumbling to the weak. For if someone should see you who has knowledge reclining for a meal in an idol’s temple, will not his conscience, because it is weak, be strengthened so that he eats the food sacrificed to idols? For the one who is weak—the brother for whom Christ died—is destroyed by your knowledge. Now if you sin in this way against the brothers and wound their conscience, which is weak, you sin against Christ. Therefore, if food causes my brother to sin, I will never eat meat forever, in order that I may not cause my brother to sin." 1 Cor 8
Cows should be made meals, not sacred.