I don't know whether your statement of " Any other religion
which permits or recognizes only 1 wife could say those religions
encourage adultery" is right or wrong because I know very little
about Islam, a religion which I respect.
Not too long ago in China,there was one child falling into the
river and the crying parents asking people to help. Some people
quickly walked away and some asked for the money. Only when the
nearby solider heard the commotion, they jumped into the river but
it was too late, the child died.
If our teachers and parents do not have the right moral values, our
future generation will be the ones walking away!