No less a source than Booker T. Washington condemned radical reconstruction for reasons not unlike those. He observed that the reconstruction policies of the north were often instituted out of vengeance and often put men of very poor moral character (i.e. the carpetbaggers who moved down south to take advantage of political opportunities and profit) into office. He also noted that it created unnecessary animosity between blacks and whites in the south.
Only "unnecessary" if you lived there.
If you were a Black Republican of the stripe of Ben Butler or Thaddeus Stevens, it was essential to your long-range vision and purpose.