You're quite wrong my friend. During the British era - communal massacres, sectarian killings, religious discrimination, and ect... was very norm. Tribes would slaughter each other and lead raids into other regions. These are just some examples, i've listed.
The fact that we are doing better than India in maintaining peace and co-religious harmony shows that Blasphemy laws do work.
The thing about blasphemy law is - that it just punishes the individual that is involved in it. I don't get where you got "house, plot, business, daughter" from.
You need proof of blasphemy of course.