Jared never said he wasn't okay with Heidi seeing other people, though? I believe they both agreed to it for some period of time. The thing is that after Jared met with Holly, Heidi said on absolute terms she wasn't okay with that (for the obvious reason that Holly was cheating on Ross) and Jared broke that trust behind her back. The way I see it, Jared's post weaponizes the fact they tried polyamory and makes Heidi seem like she's responsible for anything Jared did, when she isn't.