From
here...
As Islam is a comprehensive system of worship (Ibadah) and legislation (Shari’ah), the acceptance of secularism means abandonment of Shari’ah, a denial of the divine guidance and a rejection of Allah’s injunctions. It is indeed a false claim that Shari’ah is not proper to the requirements of the present age. The acceptance of a legislation formulated by humans means a preference of the humans’ limited knowledge and experiences to the divine guidance: “Say! Do you know better than Allah?” (Qur’an, 2:140) For this reason, the call for secularism among Muslims is atheism and a rejection of Islam. Its acceptance as a basis for rule in place of Shari’ah is downright apostasy. [said by Sheikh Yusuf al-Qaradawi]
Apostasy is an explosive accusation. On another occasion, Sheikh Qaradawi explained that “Muslim jurists are unanimous that apostates must be punished.” He further acknowledged that the consensus view of these jurists, including the principal schools of both Sunni and Shiite jurisprudence, is “that
apostates must be executed.”
Christianity is
not both a system of worship and a system of legislation. Any comparison of the two that does NOT take that fact into account is a false comparison.
Christianity is something you
choose to follow. With Islam, you follow or die.
With Christianity, there is freewill. With Islam, no freewill is allowed.
When Christianity is forced on someone it is inconsistent with Christian teaching. When Islam is
not forced on someone, it is inconsistent with Islamic teachings.
The free society we enjoy is, in many ways
derived from Christian teachings. Due to Sharia Law, Islam is
incompatible with a free society and works to
destroy free society.
Fight those who do not believe in Allah, nor in the latter day, nor do they prohibit what Allah and His Messenger have prohibited, nor follow the religion of truth, out of those who have been given the Book, until they pay the tax in acknowledgment of superiority and they are in a state of subjection.
-verse 9:29
Slay the idolators wherever you find them, and take them captives and besiege them and lie in wait for them in every ambush
-verse 9:5