I'm okay with a DM ruling that it's possible to cast it in such a way that someone is taken off guard, sure. Maybe a performance or deception vs hostile creature(s) insight rather than the typical stealth vs perception when determining surprise from sneaking, which is not RAW, but I think sounds reasonable. I'd definitely not consider it to be an automatic aspect of the spell at any table I ran.

And you absolutely could not avoid a fight and just walk away from the situation with plausible deniability because you "only insulted them".