I don't think you're entirely wrong considering the trope of "a religion of peace" and all, but the person you're replying to isn't entirely wrong either.

Claiming any religion to be uniformly the same across every member is a gross generalization, especially so for the major Abrahamic ones. 'Islam' isn't a monolith, any more than 'christianity' is—they're huge umbrella terms covering wide varieties of belief and practices.

And secondly, it's really important to be specific when talking about and criticizing religion, which is often tied to culture and nationality. Honor killings and other practices are obviously fucked up, but be specific about what culture accepts/expects that, and what legal/religious doctrine is used to justify it. Don't generalize it to each and every person on the planet who is even tangentially related through the umbrella of 'islam'.