Well, sure… but you could come up with a “nutshell” for any world religion, and it’s not too hard to make the nutshells add up. When you get into the details – say, the Noble Eightfold Path and Buddha’s antitheistic teachings – it gets trickier to make it consistent with other religions.
The monk who very pleasantly proselytised me for an hour in the Sule Pagoda in Yangon last year knew that if I stayed a Christian, I’d never reach enlightenment. Christ (and by implication his followers) only got steps 3-5 of the Noble Eightfold Path. They missed out on both the foundation of right knowledge (not believing in karma or impermanence) and the higher stages of samadhi mindfulness.
There are less dogmatic forms of Buddhism (just as there are liberal interpretations of Christianity) which are compatible with pretty much any other set of beliefs and practices. But for your average Buddhist, the whole thing functions very much like any other religion, with dogmas that differentiate them from non-believers.
This is moving well away from the topic of @Ausar’s thread, so this is the last I’ll post on it.