There a story over at the Janesville Gazette that catalogs the objections that some police leaders have to concealed carry rights (and probably to many other gun rights). See, Law enforcement against concealed-carry legislation.
I doubt that opposition to gun rights is nearly so strong among field officers as it is among administrators.
In any event, opposition to these rights is opposition to an existing constitutional right; impediments to the Second Amendment are no more legitimate than impediments to Fifth Amendment rights, for example. The Second Amendment has been treated as a second-class amendment, contrary to any plain meaning of the constitution or reasonable principle of interpretation.
Those who oppose Second Amendment rights are free to contend for an amendment to the constitution. They’re unpersuasive and mistaken, however, to try simply to wish or interpret existing, express rights away.