where does freedom of religion end, and discrimination begin?

in light of the recent ruling for the Colorado Baker who refused to make a cake for a same sex couple, i thought this would be an interesting rhing to dicuss.

where does freedom of religion end and discrimination begin?

do companies have the right to refuse service based off their religious beliefs, while claiming its not discriminatory?

how do we as a society determine where to draw the line without infringing on people constitutional rights or opening the door for future infringement?

***disclaimer***

if this becomes homophobic or intolerant in any way im deleting it and reporting profiles. please be adults💋