Fendant , the SSSSS is a random additional security screening, it is not automatic for non US international passengers, i have had it once in the last 12 months and it caused no more than an additional few minutes at security. I believe the UK operates a similar system by counting passengers, 1 in every so many. I travel on a British passport, i am also not a US citizen.
These guys are there to do a job, treat them with respect and you get that respect back.