What is the harm in using a condom?
Would you be willing to change your life based on what you read below? If you answer 'yes' or 'maybe' then keep reading. If 'no' then stop here and let me know you have no interest.
First, I'll grant you that a condom does not directly cause an abortion. Some people oppose some contraceptives because they can result in abortions. Not condoms.
What do you call a long term user of a condom? A father. Condoms are not very effective. Not at preventing pregnancy, nor at preventing disease. The harm here is it doesn't do what it is advertised to do with anything nearing high reliability.
When a condom fails a woman gets pregnant. What is the backup? Typically abortion. Boyfriend tells girlfriend that he will pay for the abortion, but she's gotta have it or else he will dump her. Happens all the time. It's the way contraceptives actually raise the number of abortions rather than lowering them. And because condoms are so failure prone, the cause a lot of abortions as 'backup' to the condoms.
Sex is very physical contact. We get all contacty. But with a condom there is a barrier to full contact. In sex we embrace the totality of the other person. With a condom it's not total. Not fully naked. Ashamed of this little part of the body. A part that has to remain clothed. That's just not how sex was supposed to be.
Sex is about a total self gift. Sex with a condom says I give you everything ... except that part of me, which I can't really give to you without preventing it from doing what it was designed to do, to share something with you that is so intimate. There is a barrier to full sharing of selves and bodies.
Sex is supposed to be in a framework of trust and of love, a life-long exclusive private intimate thing open to the possibility of new life. A condom says no to that openness to new life. It repudiates one of the natural functions of sex.
What does your denomination say? I'm sure they say a condom is just fine, as well as other kinds of contraceptives. How old is your denomination? Does it go back to at least 1930? If so, do you know what they said in 1930? How does that differ from today? Hint: Your denomination, if it actually goes back that far, historically would have more in common with Luther and Calvin AND the Catholic Church than what you would hear from your denomination today. So were they wrong then? Or are they wrong now?