Is it permissible to speak about Christianity and Judaism as a result of studying them in America?

It is permissible to speak about the laws of the Torah and the Gospel with knowledge, for they are among the laws that Allah revealed to His messengers in a manner suitable for their peoples, as Allah Almighty said: "To each among you have We prescribed a law and a clear way." The Jews and Christians distorted and altered their laws. Then Allah sent our Prophet Muhammad, peace be upon him, with a universal law that abrogated the laws of the Torah and the Gospel, and made it obligatory for everyone to seek judgment by it, as Allah Almighty said: "And We have sent down to you the Book in truth, confirming that which preceded it of the Scripture and as a guardian over it. So judge between them by what Allah has revealed" and "But no, by your Lord, they will not believe until they make you judge concerning that over which they dispute among themselves and then find within themselves no discomfort from what you have judged and submit in full submission."