kabbes
First intersubjective, then internalised
Yes it does. Which means that we don’t need to treat motive as any kind of mysterious variable to be understood. We can take motive off the table and see the thing itself for what it most appears to be and what is consistent with his other patterns of behaviour.What we've actually seen is a gesture that can be interpreted as a deliberate salute or an awkward expression of thanks. The "that's what he felt like doing" suffices as an explanation for either option.
Shorn of your expectations, teuchter, what does he appear to be doing? Twice? What is his facial expression? What is the complete gesture?
Now, what is the zoomed-out context? What is his response to the furore? What do we know about his politics?