So, I would not consider participating in that specific protest, but as Americans I believe that it is important that we support protesting itself. It is an important part of what keeps us free - our willingness to take to the streets when we do not agree with what our government is doing.
So, (IMO) if the PP believed in the things represented by the protest, no matter her occupation, she should be applauded for supporting it. Just as we should be applauded when we protest other things.
We don't have to agree on everything, but we should agree to protect our right to disagree publicly.