I also fail to understand people who so viciously defend the 2nd amendment "because of potential tyranny", but don't try to defend the 1st and 4th amendments with the same aggressiveness, when in fact those amendments are the first line of defense against that encroaching tyranny, and if they fail, it's the first clue the country is slipping into tyranny. Would you rather wait until the very last moment, until people can't take it anymore but to rise up against the government with violence and starting a massacre, all just to remove the government? Or would you try to fix things while you still can do it peacefully, by protecting the 1st and 4th amendments, so it doesn't have to come to "using the 2nd amendment right to defend against the government with guns"?
Or maybe it all comes down to who has more money to raise the awareness about it. NRA is a powerful lobby. ACLU and EFF less so.