…のも無理 (は) ない => It's natural for... N3
Evaluate
のも無理もない => (to be) natural,(to be) understandable N3
Evaluate
ねばならない/ねばならぬ/ねば => have to do; must; should ~ N2
~のは…ぐらいのものだ => only (emphasis) N1
Limit
そのものだ => exactly ~ N2
Consider it
ぐらいのものだ => Only A N1
(Not)only , (Not) even
もの/もん/んだもの/んだもん => because; indicates reason/ excuse/ dissatisfaction N3
かねない => Afraid that N2
Potential, Possibility
たいものだ => Want to A N2
Will, Decision, “Doing”
というものだ => something like; something called ~ N2
ね => isn't it? right? eh? N5
というのも…からだ => This is because… N2
Cause, reason