When Orwell mentioned about primitive patriotism, he meant that the people were silenced, oppositions were also silenced and whatever was done was unopposed without contradiction. The people were drowned and only one objective was pursed and it was pursed anyhow.
Primitive patriotism is a system where there is no opposition to the current authority. The citizens are bullied to keep quiet and blindly follow the lead of the authorities. In this system, anybody that dares to oppose will be silenced and dealt with.
When Orwell mention Primitive patriotism in his book, he described a very ugly scenario where the ruler watches everyone and appropriately silence anyone who dares to question his authority. Everyone is forced to follow the lead.
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