You seem to be confusing beavers with highly educated historians who bear grudges and crave power. They do not have intentions and are not conscious of their history in the UK, they are just beavers who will do beaver things because that is what beavers do.
The Wikipedia page you linked to references a handful of attacks mostly by rabid beavers. Rabies is extinct in the UK.
Beavers are not setting out to kill our children and take our land in revenge for past injustices against beaver-kind.