Giving in to terrorism does not end terrorism, it only ends the violent expression of it. If you do this, you end up living in fear (i.e. terror) that if you do not continue to do what the terrorists want, there will be more violence.

Anyone who cooperates with an abusive power does so because they have been sufficiently terrorized by that power and they don't want to risk further abuse. That kind of cooperation is not a good outcome; it's only the acceptance of coercion, because the alternative is worse.