Translation of schauern

I hope you could understand my last letter to you. You see, when I write in Spanish I am not very confident. I always question myself and each and every sentence takes about fifteen minutes.
If that gets out of control (riots or support for radicals), there may flourish a steady ground on which the mentioned could reoccur. Then after a while this turns to be nationalism on a larger scale.
The reason for doing an excursion to Macau was that we had to catch a flight back to Thailand. Air Asia offered a ticket for 50$, while the same flight from Hong Kong would be over 200$.