How have courts interpreted "motive" in determining whether a defendant acted maliciously or deliberately on federal property?

remaining on the premises...."), abrogated on other grounds by Huddleston v. United States, 485 U.S. 681 (1988); United States v. Price, 464 F.2d 1217, 1218 (affirming conviction and rejecting defendants's contention that "the altercation only incidentally occurred on federal property" where defendant confronted victim at public swimming facility, blocked the victim's access to his path of travel, and severely beat him and rendered him unconscious). Where the cases, like the legislative history, occasionally use the term "intent," not "motive," I again attribute the use of "intent" to less than rigorous attention to the distinction.