Is it ok for animals to be slaughtered/sacrifice,in front of a large crowd,and with a lot of noise going on?
1) Eating animals is a human need, unless you are a pure vegetarian. It may seem cruel for some people to see an animal killed (When I was a kid I used to be sad and disgusted to see my father slaughtering a little sheep). But sometimes we need to forget about our emotions if we need to do the correct thing.
2) Islam has not invented animal slaughtering. Humans used to eat meat before Islam. Non muslims also eat meat. Meat is a blessing from Allah, and in the sacrifice feast (eid al idhhaa), we are ordered to sacrifice an animal and address this sacrifice to Allah to show Him we are grateful for the blessings He gave us. In the sacrifice day, Allah just wanted us to eat from the slaughtered animal meat and donate(if we want) a part of it to poor people, to spread the blessing of Allah over the whole society.
3) the slaughtering operation should be in the best and in the most comfortable way for the animal,it so quickly and comfortable so the animal don't feel anything. Because our purpose is not to torture the animal, but to eat and fill our need, and help other poor people with sadaqah, and of course to obey Allah's orders and follow our Prophet Salla Allahu Alayhi wa Sallam.
Of course we are recommended to not make a crowd and noise around the animal being slaughtered because that will hurt the animal and scare him, and this is against Islam.
May be some people don't see every day a camel being slaughtered, so they will gather around to see this event. But it's not recommended.