The timing is definitely suspicious for the laptop contents to be released, but as for Bobulinski, I think his timing came down to two things:
1) He only had part of the picture to begin with. It was the release of some of the laptop's contents that made it clear (in his mind) that Joe Biden was in fact receiving bribes from foreign governments through his son.
2) Given his own involvement in Sinohawk, the leap to portraying the emails as part of "Russian disinformation" cast a shadow over his own reputation, and he asked the Biden campaign to issue a retraction of that characterization. I think many people naturally don't want to be involved in controversies like this because of the personal costs, but he felt it was necessary in part to protect his own reputation.
1) He only had part of the picture to begin with. It was the release of some of the laptop's contents that made it clear (in his mind) that Joe Biden was in fact receiving bribes from foreign governments through his son.
2) Given his own involvement in Sinohawk, the leap to portraying the emails as part of "Russian disinformation" cast a shadow over his own reputation, and he asked the Biden campaign to issue a retraction of that characterization. I think many people naturally don't want to be involved in controversies like this because of the personal costs, but he felt it was necessary in part to protect his own reputation.