Rebuttal of what? There is nothing in the story, its just wishful thinking of Trump fans and people like you... well Trump fans.
After 2016 and Russia working with Wikileaks and Trump surrogates to release information on Hilary, agencies rightly had to be over cautious that such tactics would be used again. That laptop passed through numerous hands, had been interfered with, Fox News wanted nothing to do with it as they saw it for what it was. And in the end it was a great big nothing burger as there is zero evidence Joe Biden did anything. In fact after months of hearings by this laughable committee there is still zero evidence Joe Biden profited in any way from anything and certainly no quid pro quo while he was in office.
The FBI is the most conservative agency in the US. Always been headed by Republicans, never a Democrat but you and the loons like Jim Jordan would have us believe its working with Democrats to elect Biden. You are a sucker for this conspiracy nonsense.
You need help and sooner the better. What's coming will hit your type the most.