Somebody is just making crap up and hoping no one who has studied history will read this.
Andrew Jackson left the Presidency in January of 1837. He died in June of 1845.
The Mexican war, therefore, couldn't have been "sprung on" him, as it didn't start until April of 1846. And the Civil War? April of 1861, 24 years after he left office and 16 years after his death. That would be like associating LBJ with the first Gulf War, it makes no sense whatsoever.
I stopped reading when I read “Rothchild”.