Why does everyone think that way? Yashur's vote was the ninth, even though 9 votes are required for an execution (17 players). This doesn't take into account the possible Priest and Mermaid, but there was no information about them, so we can't say for sure that the Warlock was definitely targeted.
It seems that something else is more interesting - on the first day, there were 2 polls, and both of them apparently ended up in the Mafia's favor, and in both, judging by the poll, there were more Mafia roles :D
His vote was the last one for Revan. The Mafia usually, when they don't want to be obviously exposed, often spread their votes, but let's say statistically, they add more votes to their own. Especially since there was a protection. And that's why those who started the movement are less suspicious, but those who finished it are more suspicious. And there was a good vote from Yashur, and a neutral non-vote from 2 people.