“Fluid in nature” appears to be a reference to the Antifa slogan, “be water.” It is a metaphor for sticking and moving together.
WATCH THE WATER?
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MOAR water stuff! Double/triple/quadruple plus meanings.
For some reason this gave me a mental image of ODO from Deep Space Nine melting/melting/melting. Ha.
Re “Be Water” Antifa slogan:
The Principal at our school uses that phrase in her emails to staff!