Dude you are being endlessly trolled. You need to take a step back.
Harambe is playing the role of the anti-vaxxer: asserting thingsa and playing dumb when people get frustrated; the refrain: "it's my opinion, we can never really know for certain" is literally how pseudoscience peddlers keep their audience when so much counterevidence exists.
His statements about dunes runner have just has much evidence to support them as the anti-vax spammers' statements about vaccine safety or efficacy or COVID deaths do.
It is intellectually weak/bankrupt to accept antivax statements without evidence but to flail in outrage about a message board poster.