Final answer:
Isolationists opposed some or all of Wilson's 14 Points because they preferred non-involvement in international affairs, particularly regarding the collective security proposed by the League of Nations, which they saw as contradictory to their principles.
Step-by-step explanation:
Isolationists likely opposed some or all of Wilson's 14 Points because they favored staying out of other countries' affairs. President Woodrow Wilson's Fourteen Points were intended to prevent future wars by promoting principles such as free trade, diplomacy, national self-determination, and disarmament. However, the key opposition to his ideas came primarily from a desire for non-involvement, as isolationists opposed entanglements in international commitments. Wilson's 14th point, which called for the establishment of the League of Nations as a means of collective security, further highlighted this divide. Isolationists would have viewed the prospect of the United States being bound to defend other nations against military threats, as stipulated by Article X of the League's covenant, as antithetical to their principles.