Everyone is quick to point out the likes of Megan Rapinoe and Robbie Rogers when it comes to gay footballers, but that's because they are affiliated with US soccer. The culture differences of US soccer and European football is like the difference between City and Newcastle. US soccer players, fans are more civilised, when it comes to the demographics of the followers. Soccer is a middle-class sport in the US, which is very popular in the college system. So yes, your average fan is a lot more educated in the US. On the other hand, the culture of football over in Britain or in Europe, is toxic and rotten. You have clubs getting fined for homophobia, antisemitism, racism, misogny on a regular basis. The average football fan here is stereotyped as unsophisticated, while this is just a stereotype, it holds some truth.
To answer the question, no I don't expect this "so-called" footballer to be well received or welcomed. Football is still 100 years behind society, here in Britain or in Europe overall.