They think it is strange that you don't run with them into the same excess of riot, blaspheming:
Speaking evil of you - Greek, blaspheming. See the notes at Matthew 9:3. The meaning here is, that they used harsh and reproachful epithets of those who would not unite with them in their revelry. They called them fools, fanatics, hypocrites, etc. The idea is not that they blasphemed God, or that they charged Christians with crime, but that they used language suited to injure the feelings, the character, the reputation of those who would no longer unite with them in the ways of vice and folly.