Cheaters Anonymous Community Group
This is a support group for cheating spouses looking for understanding and strength. Betrayed spouses are welcome to post ONLY if they can do so in a supportive manner (no bashing...these posts will be deleted), and please do not comment on 'Cheaters Only' posts.

Granted cheating is bad. But that doesn't mean it's abuse any more than it's murder. I don't think we gain clarity or anything else by muddying the waters like that.
Either by willful neglect or deliberately, I have an HPV-based stage 4 cancer that is the result of my ex-wife's straying.
It's not a punch to the face, but it is my death warrant.
Spending household funds on an affair partner is financial abuse.
Affairs are about making unilateral decisions for someone else that is completely unaware of what you're doing. On some level that is emotional abuse.
All in all I'd say yes.
Also, if we define all affairs as abuse, how can we support or encourage anyone who decides to restore a marriage after an affair? Doesn't it become problematic for couples who say their marriages improved in the long run after an affair? I struggle with the idea of someone staying with a domestic abuser, even if the abuser is in therapy.
Sure they didn't intend to kill anyone but they knew they shouldn't be driving in that condition. Just like people who have affairs know it's likely their spouse/partner will be devastated if they find out about it. Knowing this doesn't seem to have any effect on their actions though.
You raise an interesting question about supporting or encouraging anyone who decides to restore a marriage after an affair if we call it abuse. I would say that you answered that question yourself. I honestly would never counsel someone to stay with a spouse who cheated. I don't say that in a mean way either. I am not someone who believes "once a cheater always a cheater" but I do strongly believe that is a bell that can never be un-rung. The relationship is never the same and I don't think that's fair to either party.
I'm guessing one of the main reasons the general masses don't like to refer to infidelity as abuse is because most of the advice about this topic (even from some professionals) is to "try and work it out." If you call it abuse, then how could you possibly counsel someone to stay with that person?
It's kind of the difference between calling an affair a mistake or a choice. It's a choice; maybe a bad one but a choice nonetheless. Mistake just sounds nicer.