There are regional abuses of minor religions that go far beyond what most would imagine, are they less significant because they represent such a small minority of people? Surely severity should matter more than quantity, and if so how can we quantify persecution? In the research conducted by the Pew Centre Christians and Muslims are the most populous religions so therefore are the most persecuted by number, just from sheer number alone, but this doesn't detract from all other religious persecution. The Pew Centre even directly responds to this in their report stating that their research "does not attempt to estimate the number of victims in each country... it does not speak to the intensity of harassment" . According to religious persecution expert Klaus Wetzel, no religious group is free from persecution and the picture is bleak for minority and majority religious groups around the world, with some of the most populous countries having the harshest policies against certain or sometimes all religious groups.
Atheists have faced the longest most aggressive persecution in history, and it is still punishable by death in 13 countries to this day. However even in relatively open or secular societies atheists face stigma and discrimination that can affect their work, education, marriage prospects, and familial relations, while even limiting their ability to enter into politics in most countries. Furthermore some countries without direct laws aimed at atheist still retain harsh and regressive blasphemy laws that literally can punish atheists just for stating their honest opinions, for example Austria, Denmark, Germany, Greece, and Malta. This maltreatment is much more harsh and pervasive than anything faced by any religious group around the world.