From a Jain perspective, doubting or criticizing a tapasvi (an ascetic) is not encouraged. Tapasvi samman (respect for renunciants) is a core aspect of Jain samman. If you have concerns about a renunciant’s conduct, the appropriate approach is to follow proper, dharmic channels and examine actions with equanimity and truthfulness, without resorting to hostile or public denunciation.

Key ideas to keep in mind:

• Tapasvi are respected as seekers who practice renunciation, austerity, and vows (vratas). Doubting them without solid, verifiable basis goes against ahimsa (non-violence) and shraddha (faith) in the righteous path.
• If you must evaluate conduct, do so through appropriate Jain ethical procedures: truthfulness (satya) plus a non-hurtful approach (ahiṃsā), and guidance from reliable Jain scriptures or qualified monks.
• In Jain thought, doubt (sanśaya) can lead to kashaya (mental afflictions) like disgust or arrogance. It is better to cultivate right faith (shraddha), right knowledge (jnana), and right conduct (charitra) rather than harsh, baseless criticism.

If you want, tell me more about the specific situation or what aspect you’re doubting, and I can explain it in light of Jain teachings.