It depends on how things are put together, and a lot of people in law enforcement see SWAT training as a career necessity for advancement into other agencies and organizations where SWAT plays a bigger role, even though it may not play much of a role in their present job.

Another huge issue is when some situation happens and some form of SWAT is needed, and the only available SWAT outfit is from an outside agency, and staffed by people with little knowledge or sympathy for the locality. IE, a campus SWAT unit staffed by campus cops accustomed to dealing with the student population is likely to get less jumpy than a crew of redneck deputies who constantly run SWAT operations in some crackhead neighborhood in the bad side of a suburb. Even the "experience" level may not be as relevant, since the campus cops have experience in that particular place with that particular community, and the outside agency people would maybe have a lot of experience but not with the same place and population.

Kent State was an example of that sort of problem, combat troops on a college campus, although you could imagine how fucked up it would be if someone just went straight to the Lon Horiuchi option the next time some animal rights people decide to do a demonstration on some left leaning campus in California...

Cops with toys is not really a problem, cops with bad attitudes and an agenda to make sure you never really have any freedoms, well, that's the problem. The KGB seemed pretty skilled at terrorizing people with pathetic little Makarovs and simple impact weapons, so toys don't make thugs into thugs, although they can make bad thugs into worse thugs.

Then the fact that more toys get into more circulation with all of these various tactical teams increases the chances of resistors being able to obtain those toys, one way or another.