I honestly think that the fundamentalist Buddhists who are against Islam take much of their inspiration from fudamentalist Islamic policies.
In Malaysia, for example, it has long been the law that anyone who married a Muslim must convert to Islam. People who leave Islam to convert to another religion can be imprisoned. These attitudes have been entrenched for a long time.
See this article from the Economist:http://www.economist.com/blogs/graphicd ... y-chart-20
In Malaysia, 50 percent of the Muslim population surveyed who support Sharia advocate executing those who leave Islam. In Egypt, Jordan and Afghanistan it is 80 percent and over. In countries such as Lebanon and Iraq, which many in the Western world for political reasons label as fundamentalist, it is actually under 40 percent of Sharia sympathizers who advocate executing apostates.
In the comments section underneath the survey a comment mentions that scripturally there is no basis for executing apostates in Islam:
[Qur'an 3:187] "... you shall surely hear many hurtful things from those who were given the Book before you and from those who set up equals to God. But if you show fortitude and act righteously, that indeed is a matter of strong determination."
Then other quotes follow disputing this. I wonder if the Buddhists too will soon try to find canonical reasons for the human rights abuses in Burma/Myanmar.
The killing of apastates comes from the Hadiths(which are from Muhammed)
The quran teaches that Muhammed was a pure man of god and everything he said and did all muslims should EMULATE.
So since Muhammed said in the hadiths to kill apastates its perfectly good to follow and do.
Also sunnis and shias have different hadiths,so some follow different customs mixed with sharia law.
The reason also you see alot of sectiarn fighting between shais and sunnis also has alot to do with their hadiths.
For instance shia have Zenji laws which say a man and woman can be contractually married for 1 day,then their marriage is annuled the next day.(this is simply legal prostitution)
Many a sunni have killed a shai cause he Zenji his daughter.
So killing apostates is upheld in islam (based on everything Muhammed said to do being good in the hadiths)
Peace and Love