Are the aforementioned actions — such as cursing the muezzin, disbelieving in God's miracles, disbelieving that the earth does not consume the bodies of martyrs, and ridiculing religious people — considered apostasy that expels one from the faith?

Whoever mocks someone who grows his beard or raises his garment above his ankles: if the intent is to mock the act itself, knowing that it is from the Sharia of Allah, then this constitutes disbelief (kufr). However, if the intent is to mock the person for personal reasons, it does not constitute disbelief. Mocking religious people constitutes disbelief if it is due to their righteousness and not directed at them personally. Therefore, mocking those committed to the religion of Allah, if it is due to their adherence to the Sharia, is considered mocking the Sharia and constitutes disbelief. But if it is directed at their persons and their attire, it does not constitute disbelief, though they are in grave danger. As for disbelieving in miracles, if it means outright denial of their existence, it is disbelief that expels one from the fold of Islam, because it is a denial of what Allah has informed us of in the Quran. However, if it is a doubt about some possible miracles while believing in the original existence of miracles, it is not considered disbelief. As for not believing that the earth does not consume the bodies of martyrs, it is not disbelief due to the lack of explicit proof for it.