Complex sentence: Street protesters are often described as a "fixture" of the landscape or local flavor, due to an unusual degree of dedication, and causes range from enigmatic and incoherent, to marginal or unfalsifiable claims such as energy-based mind control or harassment.
Split into simpler sentences: Street protesters are often described as a "fixture" of the landscape or local flavor, due to an unusual degree of dedication. The causes they steward tend to range between enigmatic or incoherent, to unfalsifiable claims such as energy-based mind control or harassment.