First off i am going to simply narrow down the why some/many men say these things..
1)many in my opinion fear any woman having any authority/feminism or anything that could be seen as feminism..even in the church and use the scriptures that are always pointed to by Paul about this very subject to at least keep what they see as feminism out of the church. When there are other scriptures where Paul sends his regards to women who are being used by God and who he sees as partners in ministry(Priscilla, and others..do not remember them all)
2) If you are asking some pentecostal,all presbyterians and all southern baptists this, do not be surprised when they say no!
3)Womens rights was very much an issue recently..and perhaps you need to listen to God before you worry about what some dude says. I am not saying this to stir up trouble as i am sure at least one who likes to single me out for 'being a stumblingblock' as it was said..but i merely believe there is room for She in Shepard.
May i encourage you to hear what the other side says and why they say it..The United Methodists,Free Methodists,Wesleyans, Foursquare and other churches have accepted,validated,and allowed women to be in Pastoral ministry so my suggestion to you is if you still believe that you are to be a woman pastor to check out on of these denominations. And i personally thank God for my associate pastor at my church who happens to be a female and for her going against the status quo. And not worrying about the many who will point to two or three scriptures repeatedly as if they were the only ones in the bible. That said, you do what you feel God is telling you..trust that you hear from God. His approval is more important than man's approval anyways at the end of the day.