I don’t know what a .webp file is but I don’t like it. They’re like a filthy prank version of the image/gif you’re looking for. They make you jump through all these hoops to find the original versions of the files that you can actually do anything with.
The guy clearly isn’t familiar with a lot of image formats and is trying to find out about them by asking, a perfectly reasonable thing to do, and in a special community called no stupid questions, no less.
You don’t need to call anyone a gullible fool and furthermore you’ve not actually helped to answer the question “what is webp”, at all. What are you trying to achieve with this pointless aggression? If you wanted one less “gullible fool” you’d have to answer the question and educate, at best you’ve sown confusion.
I feel like this answer is somewhat warranted because OP seems to have already made up their mind that it’s bad. They referred to it as a “plague” and “filthy” despite not knowing what it even is. This comes across as a lack of interest in the actual answer and more just using this post as a platform to rant about it (despite knowing nothing about it).
It’s not unreasonable to ask everyone here to word their questions politely (or at least neutrally). This is somewhat aggressive, so I think an equally aggressive answer is perfectly suitable.