Why is it like that?

When you ask european countries who haven't joined EU (like Ukraine for example) want they to join EU (even on Reddit) they mostly answer positively,but based on my posts on r/Kazakhstan,r/AskTurkey and r/Azerbaijan,most people at least on Reddit,don't want to join the muslim union.Why people from european countries want to join EU,but people from muslim countries don't want to join the muslim union,or is it just Reddit?