Let's be careful with our arguments here. Nearly everyone supports increasing the block size. Arguing against people who don't support an increase is a straw argument that misses the point. The point, rather, is precisely how increasing the block size ought to be implemented. imho, the most insightful and thoughtful opinion on the matter has come from Dr. Adam Back.
nothing currently justify increasing the blocksize, hence all previous attempts miserably failed..
modifying any parameter of the bitcoin protocol is more hazardous than simply leave it as is, with its features.
hardfork is a failure strategy and will only result in some other altcoin.
considering bitcoin's network effect and decentralization, it is simply too late to highjack it.