'I didn't actually notice it, ' he said.
The fans seemed to be directing most of their ire-filled over-enthusiasm toward Froome, the four-time Tour victor from Team Sky who was cleared of doping accusations days before the Tour began earlier this month.
But with Thomas so far proving to be the stronger rider even in the mountains where Froome normally makes his mark, their team appears ready to let the road decide.
"The Tour de France was scared that something was going to happen to Froome in this last climb and that was the reason they were so close to the riders", Bahrain-Merida sports director Rik Verbrugghe said.
"I 100-percent believe in myself and the team, that we do everything in the right way, along with the majority of the peloton as well", said Thomas. Primoz Roglic was fourth at 2:46, and Romain Bardet was fifth at 3:07 back.
"He was feeling really good yesterday and he was looking for the stage victory", Slongo said.
Slongo said Nibali will rest for 15 days and look to return for the Spanish Vuelta in August.
The rider was able to attack on the early slopes of Alpe d'Huez, but was caught up in a crash around 4km from the summit.
Fans camping out on Huez for weeks before the race create a raucous atmosphere.
Geraint Thomas, the stage victor, overall leader and Froome's Team Sky teammate, was booed both as he crossed the finish line and stood on the winner's podium, and now Tour director Christian Prudhomme has had just about enough. They make the riders breathe in noxious air, and they blind them.
Peter Sagan won Stage 13 of the Tour de France while Geraint Thomas of Team Sky retained the yellow jersey for the third consecutive day.
"By the roadside it was very calm for 10 days, with only a few anti-Froome or anti-Sky placards".
Kristoff came off Demare's wheel to edge past, but it was Sagan who emerged the fastest, rounding up both to take his third win for the Tour.
This time, Sagan was racing against a field of top sprinters who had been greatly depleted by the mountains.
Tom Dumoulin stayed third overall at 1:50 behind.
Thomas crossed the line in 25th place on the day, with all the main contenders together to keep the same time gaps.
Twenty-four hours after four-time victor Chris Froome was slapped and apparently spat at by elements within the massed crowds on Alpe d'Huez, there was fresh trouble when a spectator threw the flare around 16 and a half kilometres before the finish of the 169.5km stage from Bourg d'Oisans.