Don't get too smug about it.
Of the Keating Five, four were Democrats. And of course it's unlikely that all the banks involved were run only by Republicans.
The Garn-St Germain Depository Institutions Act of 1982 was originally sponsored by a Democrat. St. Germain was a Democrat. There's a lot of blame to spread around to both parties.
"Deregulating" savings and loans, while preserving the cushy government insurance protection (the economic equivalent of putting a penny in a fuse box) had predictable results. No reward for good practice, and no real penalty for bad practice. Any idiot could have predicted the results.