The author constructed a weird strawman, imaginary "libertarians" who would support government forcing businesses and churches to provide goods or services against their will. That is tyranny, not liberty.
Out here in the real world, libertarians believe in the freedom of the individual, groups, businesses, and churches to act in accordance with their beliefs, without government force or coercion- including deciding whom to allow onto their property, to associate with, to do business with, or to allow to participate in their rites.
The author wrote that "the state" forced the wedding chapel to perform same-sex marriages. If the author was honest, he would point the finger at the real government of the state of Idaho, not the badly-drawn "libertarians" under his bed:
-Governor of Idaho: Butch Otter, Republican
-Idaho State Senate: 28 Republicans, 7 Democrats, 0 Libertarians
-Idaho State House of Representatives: 57 Republicans, 17 Democrats, 0 Libertarians