The 800 lashes part... is the death sentence...
Anything more than 39 lashes is considered a death sentence (because you will likely die... very painfully)
The flogging won't be administered in a single day. Most probably, they will be administered over the 4-year term. For example, the judge can decide to do 10 lashes per occasion every week.
Meanwhile, I am not seeing any pro-Palestinian activists here. An innocent Palestinian citizen has been sentenced to death on fake charges, and no one is speaking on his behalf. What happened to all those human rights activists? Afraid of Saudi Arabia? Or afraid of losing the funds from Saudi Arabia?
Had something similar happened in Russia, the BBC and CNN would have gone ballistic.