I think we have to be pragmatic. I hated him at United and when he left I thought I'd never like to see him here. However I have to look at it without emotion and with logic only. Ronaldo is a game changer and indeed a season changer. If he were to go to United now, that would make our life next season VERY difficult. If he went to Chelsea, the same. If he came here we would be odds on favourites for the league. That's the difference he makes.
If he is available and there is a chance United or Chelsea are in for him we have to be making a move to attract him here too. We can't afford for him to go elsewhere. Merchandising would benefit, sponsership would increase, fanbase would increase, and we'd have a better chance of winning everything with him than without him. It's a no-brainer for me and probably is for our owners. When one of the world's best players becomes available any team with aspirations to be the best have to be interested, I think that goes without saying.