Quoting from the official website:

>>>>>>

The new procedure targets inappropriate behavior by parents and spectators directed at children, coaching staff members, referees, match officials, or other parents and spectators. This includes, but is not limited to:

Verbal abuse (insults or profanity), as well as physical assault or shoving of one’s own children;

Verbal abuse, physical assault, or shoving of staff members of one’s own team;

Verbal abuse, physical assault, or shoving of players or staff members of the opposing team;

Continuous challenging, verbal abuse, physical assault, or shoving of referees and match officials;

Verbal or physical altercations with other parents or spectators.

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If that's the situation in, and it can't be stressed enough, a children soccer game, then yes, abandoning the match is probably the right choice. I assume they are only defining a formal procedure for practices that already exist.

When a ref abandons a match it is up to the board to decide what to do with the result. In senior games often the offenders get a lost. Plus this is youth games so results matter less.

Happened last week in the Netherlands. The home team (FC Utrecht) played terrible. They were down 3-1. Hooligans threw fireworks on the pitch and the match got suspended. The match was resumed three days later. Utrecht played much better en got a 3-3 draw.

I imagine this is the referee's call; a ref ought to know better than to abort the game because the losing team is throwing a tactical tantrum.

I would assume it’s treated as if the team of the offending parent has abandoned the match.

Safety is far more important than deciding who won a youth match

One can imagine overzealous parents tactically causing a scene to nullify a match result.