Whyte expressed his sympathy to Mr Buckley's family and admitted he expects anti-road racing critics to have their say on the tragedy over the coming days.
"It hits you for six because we have done everything we can and put so much effort in and it's like being kicked in the stomach.
"We've got to take it on the chin and continue to do what we're doing in relation to safety," he added.
"My sympathy goes out to Mark's family, his wife Jayne and the family circle. I've known them really well and they're a working class family who work hard and have put their money into motorbikes and it's hard to accept it.
"You will have people who will call for racing to be stopped, but we had 100,000 people who came to see the event and that is a massive crowd.
"You have to look at the amount of people who support this sport and who turn up in their thousands to watch it."