White text and a white bird on a red background
The white dove is often a symbol representing love and peace and has been used by various religions as well as military and pacifist groups. In this context the spirit or spirit of peace is being referenced and could be related to either religion or a peace movement. In religion, this phrase suggests the holy spirit in the trinity is with them; however, the phrase including the dove in the sentence could refer to the spirit of peace that protestors advocate.
Doves as symbols (2020, May 31). In Wikipedia. Retrieved June 22, 2020, from https://en.wikipedia.org/wiki/Doves_as_symbols