No.
It protects you from creatures of the evil alignment, it does not magically make your own action non-evil.
You cast protection from evil when you summon fiends because that makes sure the fiends won't rip you apart when they appear, it does not make it less evil.
I want to underscore this, because it is impotant.
Alignment shifts are not a magical thing, it has NOTHING to do with external magical effects, that would be absurd. Its not a sort of taint that slowly turns you evil. Having an evil alignment does not make you evil, being evil gives you an evil alignment.
- Edin
It protects you from creatures of the evil alignment, it does not magically make your own action non-evil.
You cast protection from evil when you summon fiends because that makes sure the fiends won't rip you apart when they appear, it does not make it less evil.
I want to underscore this, because it is impotant.
Alignment shifts are not a magical thing, it has NOTHING to do with external magical effects, that would be absurd. Its not a sort of taint that slowly turns you evil. Having an evil alignment does not make you evil, being evil gives you an evil alignment.
- Edin