Could be, but they haven't attacked Obsidian orbital(yet). They also seem to have broken of the attack when the station was crippled enough to need evacuation. They could have gone further, if they wanted to kill everyone.
Most first hand descriptions of the Thargoids, paints them as rational to the extreme. They do what they think is needed, without anger or empathy. Without a reason, they do nothing.
Fair point, if Goid related stuff was their motivation Obsidian would have been their first target i guess.
I realy curious how all this will turn out.
I wouldnt be suprised if the Thargoids lack any "emotions" (at least by our deffinition) at all.