Was halten Niederländer über surinamische niederländische Akzente?

Just like any other accent. Most people will be fine understanding one, some people will not. All people have accents.

You might have people making fun of the accent, just like with all accents. Some of those people will have racist motives for doing so. Others don’t see it as insensitive.

Note that an accent is not the same as a dialect or language.