Should we discuss the guru issue at all? We may commit offenses! Why not leave it to Krishna, Srila Prabhupada and the GBC?
Please examine the following quotes and see what Srila Prabhupada says:
1. The specific words used in this sloka are vama-svabhava, “mild and gentle by nature.” A good man or woman accepts anything very easily, but a man of average intelligence does not do so. But, anyway, we should not give up our reason and discriminatory power just to be gentle. One must have good discriminatory power to judge a thing on its merit. We should not follow the mild nature of a woman and thereby accept that which is not genuine. Asvatthama may be respected by a good-natured woman, but that does not mean that he is as good as a genuine brahmana. (SB 1.7.42 Purport).
2. siddhanta baliya citte na kara alasa
iha ha-ite krsne lage sudrdha manasa
A sincere student should not neglect the discussion of such conclusions, considering them controversial, for such discussions strengthen the mind. Thus one’s mind becomes attached to Sri Krishna. (CC Adi 2.117).
3. Srila Prabhupada in a lecture in New York after dealing with the issue of Bali Mardan Das: don’t surrender your intelligence; but use your intelligence to surrender to Krishna. (As recollected by Ravindra Swarup Das).