Just today I had someone casually mention that he thought women should not be allowed to vote. This is the Netherlands, the person is Dutch, not muslim or some other culture that I might not be used to, we're master's students... nothing out of the ordinary. And the third person in the conversation apparently agreed, calling it bad to prohibit it in principle but "seeing the effects of allowing women to vote" he agre…
Why don't you use the opportunity to address the points intellectually rather than silently thinking they are wrong?
First of all, the statements are very different. One of your acquaintences advocated prohibition, while the other merely opined that the overall results were negative without supporting prohibition.
What are the dangers in each position? How do the arguments apply to other questions, like voting age? How do the arguments apply to other groups, like citizens/noncitizens or felons/nonfelons?
I'm not an expert here, but I know there are some tough questions here that you might find difficult to answer. And then you might better understand how someone might hold a misguided position.
Really, most peoples' thinking is muddled on these issues because they haven't studied them. The only thing that keeps most people from saying such things is politocal correctness.