That when SA started "attacking" Iran and Russia (the countries), and the US and Canadian oil industries (not the countries), by reducing oil prices.

They started drawing from their fund to continue paying for all the entitlements their citizens expect.

They calculate they can ride it out longer than the rest because of their fund. So far they are correct.

Saudi Arabia significantly cut the oil price (which caused the global dip), and is since making up the difference by withdrawing from the oil fund.

The long term goal here is not entirely clear, but it mostly seems like a way to hurt the Russian economy and the fracking industry.

>Saudi Arabia significantly cut the oil price (which caused the global dip)

Saudi Arabia can't cut the price of oil. They can increase or decrease their own (albeit large proportional) supply.