I wrote "Gore wouldn't have ignored the warning signs that the big banks were overextended and likely to crash."  You take exception to this unexceptionable statement by dismissing me as embarrassingly ignorant about banking matters.  Without evidence you write: "For starters the trigger for the 2008 crisis was Lehman's failure. It's not a big bank. All banks are overextended, all of the time and "apt to crash".. That's called banking."

I wrote what I wrote based on my understanding of what happened in 2008.  I didn't do any specific research in advance but, in response to your citation-free claim, I googled "Bush responsible for 2008 failure".  Here are some choice quotes from the articles that came up:

From Brookings Institute Fellow Daniel Kaufmann at Forbes: 

There are multiple causes of the financial crisis. But we can not ignore the element of “capture” in the systemic failures of oversight, regulation and disclosure in the financial sector. Concrete examples abound.

. . .

Fourth, how in April 2004, during a 55-minute-long meeting at the Securities and Exchange Commission, the largest investment banks persuaded the SEC to relax its regulatory stance and allow them to take on much larger amounts of debt.

From "Bush can share the blame for [2008] financial crisis" in the NYT.

Bush's early personnel choices and overarching antipathy toward regulation created a climate that, if it did not trigger the turmoil, almost certainly aggravated it. The president's first two Treasury secretaries, for instance, lacked the kind of Wall Street expertise that might have helped them raise red flags about the use of complex financial instruments at the heart of the crisis.

. . .

experts say the administration could have done even more to curb excesses in the housing market, and much more to police Wall Street, which transmitted those problems around the world.

. . .

voices inside the administration who favored tougher policing of Wall Street found themselves with few supporters

. . .

As early as 2006, top advisers to Mr. Bush dismissed warnings from people inside and outside the White House that housing prices were inflated and that a foreclosure crisis was looming. And when the economy deteriorated, Mr. Bush and his team misdiagnosed the reasons and scope of the downturn; as recently as February, for example, Mr. Bush was still calling it a “rough patch.”

. . .

To some extent, Bush was simply following a deregulatory pattern set by Clinton. Perhaps the most significant recent deregulation of the banking industry - the landmark act that allowed commercial banks to expand into other financial activities, like investment banking and insurance - was signed into law by Clinton in 1999.

From FactCheck.org's  "Who caused the [2008] Economic Crisis":

The Bush administration, which failed to provide needed government oversight of the increasingly dicey mortgage-backed securities market.

. . .
The Clinton administration, which pushed for less stringent credit and downpayment requirements for working- and middle-class families.

From Time Magazine's "25 People to Blame for the [2008] Financial Crisis":

George W. Bush: From the start, Bush embraced a governing philosophy of deregulation. That trickled down to federal oversight agencies, which in turn eased off on banks and mortgage brokers. Bush did push early on for tighter controls over Fannie Mae and Freddie Mac, but he failed to move Congress. After the Enron scandal, Bush backed and signed the aggressively regulatory Sarbanes-Oxley Act. But SEC head William Donaldson tried to boost regulation of mutual and hedge funds, he was blocked by Bush's advisers at the White House as well as other powerful Republicans and quit. Plus, let's face it, the meltdown happened on Bush's watch.

. . .

Bill Clinton: President Clinton's tenure was characterized by economic prosperity and financial deregulation, which in many ways set the stage for the excesses of recent years. Among his biggest strokes of free-wheeling capitalism was the Gramm-Leach-Bliley Act, which repealed the Glass-Steagall Act, a cornerstone of Depression-era regulation. He also signed the Commodity Futures Modernization Act, which exempted credit-default swaps from regulation. In 1995 Clinton loosened housing rules by rewriting the Community Reinvestment Act, which put added pressure on banks to lend in low-income neighborhoods. It is the subject of heated political and scholarly debate whether any of these moves are to blame for our troubles, but they certainly played a role in creating a permissive lending environment.

So four very credible (not progressive) sources provide specific examples supporting exactly what I wrote.  Two also blame Bill Clinton's policies for the 2008 crash, which I have also argued.

Finally, you claim bizarrely that Lehman Brothers wasn't a "big bank."  From Investopedia:

On September 15, 2008, Lehman Brothers filed for bankruptcy. With $639 billion in assets and $619 billion in debt, Lehman's bankruptcy filing was the largest in history, as its assets far surpassed those of previous bankrupt giants such as WorldCom and Enron. Lehman was the fourth-largest U.S. investment bank at the time of its collapse, with 25,000 employees worldwide.

My sincere hope Flavius is that you now recognize that you really don't understand financial matters and will henceforth choose not to comment on them lest you embarrass yourself further.  Seriously.

"A man's got to know his limitations."