What do the deniers think about this?

*CONTRAILS. Condensation, when the hot air of the exhaust meets the cold air of the atmoshere you get contrails. Not unlike that of cars idling or driving in the cold weather, ie. winter, followed by water droplets that drip out your tail pipe, condensation.

That much exhaust couldn't come out of that plane unless the designer thought it would be a good idea to burn that much fuel in such a short amount of time, which would be absolutely ridiculously expensive and environmentally unfriendly.

NASA (.gov) › contrails_k-12PDF
Contrails - NASA

You should read more.

It made the sky orange too. The UFOs are coming.