Munich wanted to portray itself as “The Happy Games”, to show that they had overcome their Nazi past, so security was lax.
Pferd schiess... ;>)
They might have been concerned by the 'image' of large numbers of uniformed armed police, but the sure as hell had plainclothes cops of state police in the surrounds. Remember that the East Germans were a daily threatening presence and I don't recall a global cease fire by terrorists being in effect. And as far as uniforms threatening the German image you've obviously never seen the German Red Cross uniforms of that period, nicely cut light grey cadet type uniforms with billed caps. In 1968 when I first saw them I asked my German host which police unit they were in. He laughed as he told me.
No friend, apologies don't work. They botched the job from beginning to end, and the real reasons have yet to be known because the living still have to fear their ties to the Stasi being exposed to this day. The true extent of Stasi and Soviet penetration is yet to be uncovered if ever.