They were not a nutty cult and the fire was caused by the tear gas.
Wikipedia is not the source of truth at all.
And it's very clear knowledge that tear gas canisters cause fires in enclosed areas:
https://sourcenm.com/2022/08/05/tear-gas-grenade-thrown-by-b...
https://www.austinchronicle.com/news/2000-07-07/77866/
Now you go update wikipedia, if you want.
The group is still indeed a nutty cult and while the gas used may contribute to a fire, there was evidence that the Davidians did start the fire, whether or not the gas helped it grow.
And we don't know if they were a wacky cult because the ATF burned everyone to death so no interviews...
This one seems to be a good enough summation: https://www.pbs.org/wgbh/pages/frontline/waco/topten2.html
People from the cult did survive, did do interviews, and even brought lawsuits. A large group was released before the fires and nine more survived the entire incident. So maybe you aren’t as familiar as you think? Furthermore, we already know more than enough about the cult from _before_ the incident. It’s pretty clear they are a nutty cult.
But, I suspect none of what I wrote above matters to you. You’ll probably still say that it’s a conspiracy and the group was a normal gathering of people, ignoring all of the evidence to the contrary. So I’m not even sure what I hope to gain from this response.
But you still didn't answer my question...
Where is the evidence that the Davidians started the fire?
As addressed in the upstream PBS summary and the released report linked here, arsom investigators concluded the fire started at multiple internal ignation points simultaneously etc. etc.
The report lists the physical evidence that led to that conclusion.
Naturally you can assert that the report was doctored and the evidence fabricated, others can then respond and ask where is your evidence <shrug>.
There were lots of survivors
Whether the fire was accidentally started by the tear-gas or set by the Branch Davidians themselves isn't actually all that important in deciding if they're a wacky cult or not.
It's sad for them. Cults have a lot of innocent brainwashed people. Koresh himself probably had serious mental health problems which is pitiable.