JEWS FLEE FROM GERMAN BOYCOTT BEGINNING TODAY COPENHAGEN, Denmark, Apr. 1 (AP) -All trains entering Denmark were crowded with Jews today, fleeing from the boycott in Germany. Beveral hundred disembarked here. TO GIVE UP CITIZENSHIP BRUSSELS, Apr. 1 (P) Reports of treatment inflicted on his married daughter in Germany caused Protessor Albert Einsteln, world famous physicist, to resolve to give up his German nationality, it WAS learned today. BANK ACCOUNT CONFISCATED BERLIN, Apr. 1 (A) -Professor Albert Einstein's bank account, amounting to about $7000 was confiscated today by the political police on the ground he intended to use the money for treasonable acts.