By placing that on your wall, you endorse 250 years of slavery and 150 added years of inequality in the United States.
By placing that on my wall I endorse dozens of Godly men whom had flaws, but whom had faith in the Lord to the uttermost. Many of which, though supposed evil people, funded Sunday Schools for slaves and free blacks to learn to read and write. And since the Lord saved some of them, that gives me.
Stonewall Jackson I endorse because of his faith at all points in life and his zeal for evangelization and kindness.
Lincoln I endorse because of his "making the best out of a poor situation". He did ultimately hold this country together, and he did eventually free many slaves.
Lee I endorse for his faith and his honor in choosing against the easy path by taking the position in the Union army and instead choosing the honorable, but hard path to defend Virginia against foreign encroachment.
You may be my brother in Christ, but this brother is offended by your open endorsement of an inhuman practice for which the United States has never repented.
We are indeed Brothers, yet I am offended (slightly) that you have such hate in your heart that you believe anyone with the battle flag is pro-slavery. That's almost as bad as being pro-slavery.
Additionally, my ancestors wound up fighting for the Union during the War Between the States, so I would say the United States has well repented considering the death toll.
God will address you in due time.
Indeed, He will address all of us. What remains to be seen is if your idea that "Anyone who flies this flag supports slavery" is indeed biblical for that is clearly a blanket statement.
As for my part, I think not, for if He subscribed to blanket statements then God would not have offered to spare Sodom for "10 Righteous men". God would've destroyed the city regardless of the amount of righteous men inhabiting it. God's offer to spare it in the event of 10 righteous men being found living within it shows he is discriminatory and not a fan of blanket statements.
One of the many men I look forward to meeting in Heaven one day is Stonewall Jackson.