Why can't we raise a question on these offerings?Whenever we go to any temple or place of worship, from almost everywhere we get something in the form of prasad, which we accept as God's prasad. At that time most people don't think whether the prasad they are eating is pure or not, because they believe that prasad is directly given by God.
Even if someone questions its purity or hygiene, he is silenced by saying that this is God's prasad which is the purest than anything, so eat as just as given. But now the time is changing and the new generation expects a logical answer to everything. It would not be a wise decision to harm the body in the name of God's prasad/offering.
The same God we worship has made us so capable that we can think to raise some questions and get answers. People are also drinking the water flowing in the rivers as pure water and the same few people are engaged in making the same water dirty by washing clothes, taking bath in the river, etc. God does not ask for any kind of compromise with purity and hygiene then why people afraid to raise questions in this matter.