I always have to go back to the root of the problem, as a I see it, and that is that the outcome of conversion is debatable as to whether or not it's doing the individual any good. Of course, all proselytizers believe that the outcome of conversion makes that individual a better person. But does it?
I once had a nice friend. He came to my old house to help with redoing the shingles. We had a couple beers afterward, and ordered pizza. It was a fun couple of days, joking around, working together. Later, he went back to his hard-core evangelical upbringing. He became a condescending jerk instead of a fun-loving man. I ended the friendship. Who wants to be preached at continuously?
In India, many men take jobs overseas, in the middle east, in Europe, etc,. as temporary foreign workers, usually seeing it as temporary, a way to get enough money to maybe buy a plot of land back home. While they're gone, the Christians pounce on their lonely wives. Then, when the man finally makes it home, his wife is new person, and the trouble starts. The christian could have easily provided company for the woman, without the faith, but no they didn't.
There are so many downsides to conversion. That's why I'm against proselytizing, in all directions. Generally, when I bring this factor up, it's just sloughed off, as 'You're exaggerating' or 'That doesn't really happen.'
I think we all know folks who've had big changes in their lives. Marriage to a dominating spouse, religious conversions, changes in lifestyle, etc. I don't like the recently converted vegan preaching at me either. They go on about how much they feel better about helping the planet, and such, but because they wear it on their sleeve, it gets really annoying.
So I would urge anyone engaging in the act of proselytizing to take a real hard look at the outcome of a few friends. Just because they've learned to agree with you doesn't make them better people.