They don't care if it is a Confederate statue or a Union statue. To them they are statues of AMERICANS. They are symbolically toppling AMERICANS. It's not a left or right thing it is a Communist vs Capitalist thing.
Maybe we should do a swap. They throw down a statue, we throw down one of the left's statues. If it's OK for them, it should be OK for us. What should we start with? Hmmm.