That seems to me to be quite normal. My cats also get agitated when a "stranger" cat is around, even if the "stranger" cat lives in the same house. The cat is upset and lashes out at everything. You might try Feliway spray or diffuser, available from vets and pet shops. This is based on a pheromone/hormone and helps to calm cats. I find it most useful when a new cat is...
08:24 Wed 05th Aug 2015