No, it is not. Witches gain their powers through workings with the demonic. I am an angel of the Lord.

[Things across different worlds could be problematic at times. In some worlds, witches were cool and great. In Castiel's, well, they were not.]

I had heard rumors that there might be some. While I don't think they could fight for anything other than themselves, they might with the lack of new vessels to take over.

[It makes sense to him. He does stop there in his wandering words to give Alec another look that doesn't miss the wounds or blood, ending at him looking over the sword.] That looks serious, unless you are not a human.