for my understanding,
catholics are ok, they still pray to their ancestor or holding joss stick.
the problem is the protestant, their are stricter than catholics which they do not hold joss stick. they differentiate themselves as christians and catholics as catholics.
We have to look back to history that protestant branch out from catholics because they do not want to worship mother Mary and hence the name "protest"ant. They only worship to Jesus himself.
Well, the above theory is based on my observation and interaction with people around me.
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