Here is my take on this.
I will be there, in uniform, as a decorated war veteran. Hence, I will not be wearing a GOE arm band. Should any protestor attempt to deface any monument I am near, I will do what I can to stop them, and hold them for arrest.
The GOE folks are asking that their people not interact with the protestors, but call on police to do that. I don't feel bound by that restriction.
We are going to be dealing with some nasty folks. I intend to use appropriate force, only if needed, to prevent vandalism. I know several of the names on that Wall who made the ultimate sacrifice.
I do not intend to permit some commie pinko bastard to deface it.
Thank you for your service to our country. I support you in this and will be praying for you. I have such contempt for those who would do something like that. IMO, they're worthless pieces of human refuse.