It is completely understandable if you look at it from the perspective of CONTROL. For that is what it's about. All of them understand there is no Constitutional basis for it, but they want to CONTROL the people of this country. They view government as a growth industry and the Constitution as a SUGGESTION.It also makes sense when you look at it from the perspective of the federal bureaucracy. The alphabet agencies are filled with career bureaucrats who have every intention of retiring with a full pension. Controlling other people's lives is their livlihood, and the more of it they do, the more they get paid. Your freedom and their career objectives are in direct conflict with each other.
You also have to consider that most bureaucraps are control-freaks anyway, else why would they get into that line of work? The ninja-suits and the no-knock raids are the emotional equivalent of sexual release for these pencil-necks who probably got turned down even by the town pump when they were growing up. This experience is likely what turned them to be ninjas. It's kinda like being able to rape that prom queen who wouldn't speak to them. It's life-or-death POWER over somebody else and it's a MAJOR orgasm for these freaks.
BTW, I can respect (and back up, if needs be) the beat cop who has the protection of the public from VIOLENT criminals as his or her goal, but when they get off into ninja bs and asset-theft, that goes out the window, too!