Why is it that on Reddit, being antisemitic is wrong but being Islamophobic is okay?

Reposting because I completely botched my question.

Why is it wrong to be antisemitic but okay to be Islamophobic? Simple criticism of Israel or Jewish faith is met with claims of antisemitism but the Muslim diaspora is seen as just an incompatibility with western values?

Aren’t both just hatred of people based on religion or faith?