ames:
Not to sterilize, but to attempt to avoid any religious influences that would prevent/disuade someone from becoming a Torah Jew.
Three points:
1: If there were no Jews in the Public school system, the no-one would care.
2: Its easier to get someone back after Z’nus vs. someone who is convinced Avodah Zara is correct. The first just needs to be brought back, and the rest will follow. The second needs to be convinced that what they are doing is wrong.
3: We should also fight teaching of “overt” topics in public school as well.