How would you react to a practitioner of a Dharmic tradition partaking in your liturgical services?

The church I on occasion attend hosts a weekly outreach event open to the general public. One of the attendees is a newcomer woman from Sri Lanka whom I have witnessed lighting candles and venerating both the icons and the cross. Surprisingly enough - (as per the priest) she is not a Christian and has no plans of becoming one anytime soon. Based on the fact that she sticks to a strict vegetarian diet as well her country of origin, I would guess that she is likely either Buddhist or Hindu in terms of creed. How do you feel about this?