It's difficult to describe the fanatical support given to Brazilian drivers at the Brazilian GP... perhaps the only thing that comes close is the Ferrari support at Monza.
But, the really weird thing is that Brazilian drivers actually have a fairly poor record at the race. Aryton Senna only won twice (while his great rival Alain Prost is the most winning driver with 6 wins), as did Nelson Piquet, Emerson Fittipaldi (who won the 1st 2 races) and Felipe Massa. It's also a race that Lewis Hamilton has had little success - also "only" winning twice.
There's been a World Championship GP in Brazil since 1973, initially at the fearsome 8km long orginal Interlagos track, then at Jacarepagua in Rio from 1978 until 1989 but moved back to the shorter version of Interlagos at is still used now in 1990.
Like our Majors series this year, Interlagos has often been the last race of the F1 season and has seen some remarkable championship clinching performances - maybe the most dramatic being Lewis Hamilton's 1st WC win where he gained the position he needed at the last corner to snatch the championship from home favourite Felipe Massa - who'd won the race 30 seconds before to crazy scenes from the spectators who also believed he'd won the championship.
Even outside of championship deciders, Interlagos has seen amazing incidents. In 2001 Jaun Pablo Moytoya made his F1 debut and led comfortably for half the race until he was taken out by Verstappen. No, not Max, his father Jos :-) Maybe Max should have remembered that after his clash with Ocon a couple of years ago :-)
There's a dark side to the GP as well - San Paulo is notorious for thefts and many spectators get mugged each year travelling to and from the track. There's even been break-ins to team trailers and the pits!
Previous Majors Brazilian GP Winners:
2015: David Williams