LOL ..as opposed to Rominists that use "secular" sources ..LOL
When discussing Catholic Doctrine or Catholic dogmatic teaching it is appropriate to use Catholic Sources. Just as if I wanted to know what Calvin believed/ taught I would use his "institutes". When discussing historical events etc... it is appropriate to request a secular source.
You want to know something? I never linked to any site so how does anyone know where I found the info. Frankly, I do not remember since I first found that info way back in the late 90’s but most of it was secular history sites. I remember one site had pictures of people being burned at the atake. I thought how can any Christian do something that evil.