Though on the other hand, it could also be said that the X-Men to some degree manipulated the situation like a masterful game of chess in a way that tensions would escalate and that Franklin would want to go with them. That they had backed off when it became apparent that the ball was in their court after the revelation of what Reed had done further puts them at an advantage in that. Now they probably didn’t anticipate him running away, but it does still place him closer to their own grasp.