Use your own critical thinking skills and reading comprehension, and read the full sentence.
"We oppose the teaching of Higher Order Thinking Skills (HOTS) (values clarification), critical thinking skills and similar programs that are simply a relabeling of Outcome-Based Education (OBE) (mastery learning) which focus on behavior modification and have the purpose of challenging the student’s fixed beliefs and undermining parental authority."
The list of opposed curricula is disjointed, "critical thinking skills" is not capitalised, unlike the two other specified subjects, suggesting that the paragraph is talking about critical thinking skills in general, and not a specific methodology of the same name. Taking into consideration the rest of the document, which rails against anything other than loyalty to the Christian faith and and Christian morality, it doesn't take a whole lot of critical thinking to understand that what constitutes "purpose" in an environment expecting total loyalty and faith can be anything that might conceivably challenge religious notions, and nor does it take a scholar in logic to understand that verbiage more broad and vague than what is needed to address a stated desire is of no use to anyone aside from a party with hidden motivations.
Critical thinking requires an understanding of context.