If it is true that...

All property relations have been subject to historical change consequent upon change in historical conditions

Then it must be true that...

Modern bourgeois private property is based on class antagonisms and exploitation of many by few

If it is true that...

All property relations have been subject to historical change consequent upon change in historical conditions

and

Modern bourgeois private property is based on class antagonisms and exploitation of many by few

Then it must be true that...

The abolition of private property is intended by communists