A Lebanese student rejected from a German course

There is a global entrepreneurial competition in Germany where young students from around the world were supposed to meet over weeks and discuss population explosion.  So a student from Lebanon applied (and he is Christian, lest you think he was Jihadi) and he was accepted.  But while he was getting his papers ready, he received a note from the German sponsoring organization informing him that he would not be invited after all because a video on his Facebook shows a burning of the flag of a democratic country.  He explained to the interviewer (on OTV in Lebanon) that indeed when he was 17 years old, during the war on Gaza, someone tagged him with a video of a protest in which a flag of Israel was burnt.