This whole screw up has NOTHING to do with politics, for this is a national security issue. Any attempt at explaining away this egregious carelessness by setting up Biden as a "straw man" is nonsensical.
Don't take my word for it, ....rather, lets examine the US criminal code, shall we?
The penalties for disclosing Top Secret information outside approved US government channels include fines of up to US$250K and ten years in prison, under section 798 of Title 18, the United States Code federal criminal code.
Was it "Top secret information' . Once again, I will avoid offering my opinion and defer to a former CIA director and Defense Secretary. “I don’t think there is any question that we are dealing with classified information. These are war plans,” Leon Panetta, a former CIA director and defense secretary, told MSNBC regarding Signalgate on Tuesday. Panetta said what was described in the report all qualifies as “highly classified information.”
If these clearly unprofessional and unqualified MAGA cultists had just admitted from the get go that they had screwed up, 'Signalgate' might never happened. But, as the 'dream team' has been playing fast and loose with national security, they didn't want to be discovered as being habitual users of the easily hacked application. Additionally, they didn't want their conversations to go on the public record, so they preferred using Signal to avoid any sort of public scrutiny of their gross incompetence and amateurism.
Bottom line is that this is NOT a political question, but rather an issue of comprised national security. As it stands, what other country would EVER want to share intelligence with the USA after this debacle? Oh, right....Russia, El Salvador and possibly North Korea, the new friends and allies of this pariah state.