Vedas is an open platform of free thinking... Anybody who even wishes to comment on vedas should heighten his/her level of thinking and free his/her mind from any prejudice...
Please understand following points about vedas...
1. Vedas are not "Religious Books". These are compilations of "Knowledge and Wisdom" contributed by various Rishis in their human or superhuman state of mind.
2. They never proclaimed in any part of vedas that they are supreme, ultimate or most correct/accurate form of knowledge. Some contents of vedas themselves establish counter opinions/questions about earlier established chunks of knowledge(Refer: Nasadeeya Sookta, Rigveda).
3. Vedas always kept themselves free for further additions/corrections.
4. Even the story about vedas claims that it is a handful chunk of knowledge taken from four mamoth sized mountains of knowledge.
5. Yet it becomes difficult for present humanity to study, understand or digest vedas even a few percent. So at our level, we can only strive to study and understand vedas and later if we can assume ourselves to be capable enough, can try to criticize certain chunk of knowledge in vedas, that we believe we have understood enough.
6. The key is to keep our mind sufficiently free to accept our criticism, and keep a goodwill to contribute something fruitful to pure and eternal knowledge...