Technically - and this is a point of irony, IMHO - everything that has ever taken place here in this planet when it comes to viewpoints is a matter of testimony. One side sharing their perspective on why they came to believe what they believe and how that differed from where they were before - be it on religious views or on views of politics and many other things. It is not always an emotional ordeal nor does it have to be one since for many it is and will always be simply about the facts being addressed as they understand it.
And of course, as there will be others outside of the position one holds to who disagree, they will share their perspective (be it one where they converted or not) - it is always a matter of perspective. Someone divorcing another because of an affair their partner had and then remarrying (if using the love example) is logically going to have strong feelings - and on the issue, having strong feelings/conviction DOES NOT make the choice automatically wrong or something to be dismissed.....just as others critiquing (be it those who felt the marriage should have continued or those supporting the decision to leave) are going to have feelings on it. Of course there are unconscious desires at work - and that's basic to humanity. But being vocal as a convert or supporting a change intensely doesn't take away from the logic of what is being supported - even the most vocal converts can tend to stick to their newfound faith because of the superiority of its arguments, or the plain logic of its core principles.
And if core principles are being dismissed because of others having strong feelings, that's dismissing/avoiding dealing with the issues - no different than someone saying that it's wrong for Bill to feel that Susan is a hard worker (counter to his ex-wife who was bad with money and didn't have good credit like Susan) because of how intensely he thinks the world of her. One may wish to focus on saying "Bill shouldn't feel the world revolves around Susan" - but that has nothing to do with showing whether or not Susan is a hard worker.....and if he's right on Susan being a hard worker, it matters little whether or not he is also zealous for praising her as well.
I have an Aunt and Uncle who divorced after 24 yrs of marriage. They came close to divorce on multiple occasions - my uncle, however, still has a picture in his house of him and my aunt as well as pictures of them and my cousins from their marriage. Of course he is dating and seeking remarriage as my aunt is - and of course, they had their reasons for divorcing (financial and strife more so) - but that doesn't logically mean they vilify every single thing they did when they were previously married. They appreciate new partners for who they are and obviously feel they are superior in certain ways - just as family members do, even if those family members don't really like the new partners more so than the new...but newfound convictions are natural. Some of them will be good/true and others won't be accurate - but it's a part of development. And many of them live happy lives till their deaths and are quite stable. That has happened for a long time.
Likewise - it is the same with convert testimony or stories of others sharing why they grew up as they did. And if the emotion/strong conviction is wrong, so is the act of speaking on this forum anytime something comes up one disagrees with.