Does these Venerables need to take such extremes measures on causes they feel so strongly about?
After all, the Lord Buddha also teaches us moderation in all our action, speech and mind. Even the first Buddhist precept of ‘Do not Kill’ should includes the self as well. All lives are precious especially when born as a human.
If they feel so strongly on certain cause to such an extent that they are even prepare to sacrifice themselves, then they should have shown more resolve and patience and devoted the rest of their life to achieving their aims instead of needlessly taking their own life.