Just because the original creator was a neoreactionary does not entail that the software is intended to (or even can) promote the establishment of a neoreactionary political system.
The best way to get an idea is to read this series https://urbit.org/understanding-urbit/. This is also a great high-level introduction that skips the more technical aspects: https://urbit.org/blog/urbit-for-normies/.
I'd try to explain more here, but I cannot do a better job at than they've already done.
Edit: Also, it's despised by many on ideological grounds due to its creator's (who is no longer affiliated with the project in any way) political views from a decade ago. I'm not going to comment on this any further, because it's a tired case (discussed in literally every other thread on HN about Urbit) and I find it quite petty.
