Regardless of what one thinks of Lee and his military abilities or personal virtues, the reasons are understandable why any highly visible tangible symbols, like portraits and statues, might be removed from Federal institutional settings and certain public places. Such physical work representations of leaders of the rebellion in the modern era could serve as constant reminders of division and inequality, or even possible rallying points for extremists. Lee was considered a traitor by the U.S. government, notwithstanding his efforts to secure peace and promote unity after the surrender.
Can see that evidence of Lee's involvement in past events is slowly and surely being confined to entries in the history books.
The real concern for me would be if they started tampering with the truth of history by mandating changes in the content of the history books. Like their Union counterparts, Lee and other Confederate leaders were an integral part of what happened during the war, notwithstanding any differences in beliefs and motivations. References to their names and actions must never be expunged, or otherwise distorted, from the records of the past, if understanding, awareness and freedom is to be valued.