35. The discussion about whether or not... is a very controversial one. There are people on both sides of the argument who have strong feelings.
36. Those who criticize/oppose/object to/are against ... contend/argue/hold that...but people who advocate/favor/are for...,on the other hand, maintain/assert/claim that...
37. Some argue/hold that...,but others set forth a totally different argument about the issue of...
38. The other side of the coin has voiced strong opposition saying that....