Insanity
You said - "In Islam, a person who has committed blasphemy can either be killed or crucified, or his opposite hands and feet can be cut off, or he can be exiled from that land. On the other hand, in other religions there is no other option except capital punishment. Islam at least has four options of punishment for an act of blasphemy."

Now hold on there! Please read what you quoted from Manusmriti:
“If a man born of a lower class intentionally bothers a priest, the king should punish him physically with various forms of corporal and capital punishment that make men shudder.” [Manusmriti 9:248]

First of all the verse above has nothing to do with Blasphemy. If it has,probably it's your own interpretation. Secondly, it gives clear options when it says - "punish him physically with VARIOUS FORMS of corporal and capital punishment". Now Corporal Punishment is not necessarily DEATH. Isn't it?

Most of the time I have seem the overly religious kind of people resort to what we call beating around the bush using misinformation and diversion. I hope you are not resorting to that here.