Copyright law does not grant you tge right to spread something you downloaded even if it was free. The original rights holder may decide who can and cannot host what part of their product for what reason. Free software usually permits you to redistribute the software you download, but there's no such freedom in closed source software. This is part of the "free as in speech" qualifier of open source software.

Microsoft does allow you to download the ISO for free, which is why I don't understand why they didn't include a patcher either.

Looking at the official twitter account for the project, it seems like the project maintainers (and likely their users) reside somewhere in the Middle East, given that they seem to speak Arabic. Perhaps the average Internet near the project's target audience are low enough to warrant uploading a customised, minimised ISO? I don't know, a patcher seems like a better choice to me. Maybe they'll switch models now because of the takedown?