Earlier quoted context omitted.
If you watched the state of the union, you know that Trump made a proposal about DACA that was such a huge compromise to the left, that much of his base raised hell. The left refused that compromise, and refused again, when he asked for DACA and the wall to be addressed in the latest spending bill. Since he has twice been rebuffed on his compromises, he's going the other way. That seems reasonable to me.
I don't think very many left-of-center people would agree with your assertion that it was a "huge" compromise. They wanted tens of billions of dollars for a symbolic wall, closing of several legal immigration processes, etc. There are several DACA fixes sitting in congress but Republican leadership refuses to bring any of them up for a vote.
In fact the wall would have been physical, rather than 'symbolic'