I saw one of those booths on library property recently. I consulted with an attorney from FFRF.org who confirmed it is legal in the US to use gov't property in that fashion unless certain groups are being favored over others.
My library's policy is to permit groups with differing views to promote free exchange of ideas and freedom of speech. I am considering writing to my library board with quotes from the litteratrash that restrict freethinking and freedom of speech.
I do not like religious groups using government property. I feel it violates my legal right to freedom from religion. Unfortunately, it's a feeling, not a fact, that such property usage violates my legal rights.
Perhaps other jurisdictions would have more luck than I did.