What is meant by the word "Qassam" which is commonly used to mean "God"? Is its use in phrases like "I will strip you of your Qassam" or "Go, be Qassam-ed" considered disbelief? And what is the ruling on cursing the religion of Islam by saying "damn your religion"?

Using the word "al-Qassam" as an insult is a bad habit, and it is often understood to refer to Allah Almighty. Insulting Allah is disbelief by the consensus of scholars, unless the one insulting is ignorant of this meaning. As for insulting "at-Taqassum," its meaning is unclear, and no judgment can be made about it except by further inquiry. Cursing the religion of Islam is disbelief. Cursing the religion of a Muslim person is disbelief, unless he intended the corruption of his religiosity and not Islam itself, in which case he is disciplined. Cursing the religion of a non-Muslim is permissible if it is pure disbelief, as long as it does not lead to cursing Islam. Cursing the religion of a Christian or a Jew is disbelief if one intends the true religion, and it is not disbelief if one intends the falsehood within it.