Question is, when people learn that I'm Muslim, will Poland be safe for me?
Generally, yes, as long as you avoid drunk people like the plague. Most overt violence and anti-social behavior in Poland is associated with alcohol use.
The form of discrimination that you are most likely to meet in Poland is "benign neglect". You won't be actively excluded, but you won't be actively included, either. If you're assertive and willing to make the first move and are not discouraged by frequent rejection, you may win a few friends and carve out a place for yourself. If you're shy, you might as well be invisible.
Based on your rather telling user name, however, I do not think that Poland would be a wise choice for you. Or anywhere else outside of your home town. You're going to fail miserably with an attitude like that, and other people will be more than willing to help you fail.