Iran only executes 150 people a year and they are the Islamic nation that executes by far the most people. And less than 1/5 are even tied to religion, let alone religion being the main cause - most are violent criminals such as rapists, they like seeing rapists hanging from construction cranes. Of the religion cases, the vast majority have to do with criticizing Islam rather than anything to do with Christianity. Literally the only confirmed case of a christian getting formally executed in Iran by their government is Hossein Soodmand - for being an apostate preacher.

It is common people performing lynchings that target christians, but not governments to kill them.