With the threat of terrorism today, it's more important to sacrifice a few civil liberties for the greater good. For example, everyone accepts longer waits in security checks for airplanes if it means that we can all be safe. The government has to make sure that everyone is safe, or all of our civil liberties are meaningless.
What has happened in recent years calls into question how far this can go, because it is a slippery slope when liberties are willingly given up for security. The line has to be drawn somewhere, there does come a point that you're giving up too much for it to be worthwhile, or even helpful. But a few things here and there are worth the security granted for giving them up, such as guns.