I'm presuming there's a lack of barriers like most of TDF stages besides the odd mountain climb and a bit at the stage banner, such an easy target for disruption unless the law clamps down on the protests hard.
How about equipping all the riders with water pistols/rifles, that fire bull excrement instead of water?
Disrupting/blaming pro cyclists for the horror show in Gaza isn't going to stop the horror and risks the future status of Vuelta being a Grand Tour and the whole situation for the race is BS!