Isn't the "support" just for entities accepting payments with Stripe, rather than the customers who are actually paying? I ask this because I accept payments with Stripe, and have seen cards processed successfully from many countries, even non-Western countries that Stripe doesn't offer merchant support in.
I understand that shopping online in Europe is a bit more complex with the EMV/Visa Electron system that is popular in the region, so I get where PayPal would fit in here since it can be linked to a checking account. Just wondering what specifically you mean by Stripe not "supporting" certain regions.