Salaamu alaiykum Sorry for intruding but I would just like to point out that the spectrum of reaction and da'wah is very wide. Da'wah can be in the form of speech, self practising, handing out leaflets, helping the community etc. There is more ways to react to such statements than to insult or become haste in letting out all the 'ilm in one shot. I'm probably misunderstanding your post (and I guess I'm now open to ridicule and rejection myself ) as I usually do to everyone's but I thought I'd put that in just in case.