It’s hard to read because everyone is saying true things. Grant wasn’t lying when he said that he read that the ideal temperature for the virus was 8C or whatever. He just misspoke when he extrapolated that the virus was very sensitive to heat and humidity. It might be true, but it’s not a necessary conclusion of the previous fact, and experts have gone on record saying they’re concerned that this won’t be meaningfully slowed by warmer temperatures. If Grant would have just admitted that his post was a bit optimistic, this argument doesn’t happen.