I don't see the comparison though.
In the case of the Commonwealth, the UK empire was going strong and the guy was a royalist, aka supporter. The message "end the illegal war in Ukrain" aka Putin's genocide, does not really share a lot of commonalities here. If the message were to stop the Commonwealth from colonising everywhere and killing people then perhaps there would be a similarity, but I don't see the connection in the statement made here.
The UK did not exist in 1652. It was formed by the Acts of Union 1800. In 1652, England was (briefly) not even a monarchy - that is what Commonwealth refers to here, not the modern one.
Urquhart was imprisoned from 1651-1652 for fighting on behalf of Charles II, who was King of Scotland until his defeat in 1651, and trying to take the English throne. He didn't get the English throne until 1660.
The first English civil war started in 1642, Charles I was beheaded in 1649 and his son Charles II would not be king in England before 1660 at the restoration.
So in 1653, a 'royalist' was against the 'Commonwealth', which was the anti-monarchist side.